calculate the standard free-energy change, in kilojoules, at 25 °c for the reaction 3 pb (s) 2 fe3 (aq) → 3 pb2 (aq) 2 fe (s) e∘cell = 0.090 v
a. 52 kJ b. -52,000 kJ c. -52 kJ d. -26 kJ
Answers
The answer is (c) -52 kJ by using the formula the formula for calculating the standard free-energy change (ΔG°) is:
ΔG° = -nFE°
Where n is the number of moles of electrons transferred in the balanced chemical equation, F is the Faraday constant (96,485 C/mol e^-), and E° is the standard cell potential.
In this case, the balanced chemical equation is:
3 Pb(s) + 2 Fe3+(aq) → 3 Pb2+(aq) + 2 Fe(s)
The number of moles of electrons transferred is 6 (3 electrons for each of the two Fe3+ ions). So n = 6.
The standard cell potential is given as E°cell = 0.090 V.
Plugging these values into the formula, we get:
ΔG° = -nFE°
ΔG° = -(6 mol e^-)(96,485 C/mol e^-)(0.090 V)
ΔG° = -52,006 J
ΔG° = -52 kJ (rounded to the nearest kilojoule)
Therefore, the answer is (c) -52 kJ.
To calculate the standard free-energy change (ΔG°) for the reaction, you can use the equation ΔG° = -nFE°_cell, where n is the number of moles of electrons transferred, F is the Faraday constant (96,485 C/mol), and E°_cell is the standard cell potential.
In this reaction, 3Pb (s) + 2Fe3+ (aq) → 3Pb2+ (aq) + 2Fe (s), the number of moles of electrons transferred (n) is 6 (2 electrons for each Pb, 3Pb in total).
ΔG° = -nFE°_cell = -6 × 96,485 C/mol × 0.090 V
ΔG° = -519,570 J/mol or -52 kJ/mol (rounded to nearest kJ)
So, the correct answer is c. -52 kJ.
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To calculate the standard free-energy change (ΔG°) at 25°C for the reaction 3 Pb(s) + 2 Fe³⁺(aq) → 3 Pb²⁺(aq) + 2 Fe(s) with E°cell = 0.090 V, follow these steps:
1. Use the formula: ΔG° = -nFE°cell, where n is the number of moles of electrons transferred, F is Faraday's constant (96,485 C/mol), and E°cell is the standard cell potential.
2. Determine the number of moles of electrons transferred (n) by balancing the half-reactions:
Pb(s) → Pb²⁺(aq) + 2e⁻ (oxidation half-reaction)
Fe³⁺(aq) + 3e⁻ → Fe(s) (reduction half-reaction)
Multiply the first half-reaction by 3 and the second half-reaction by 2 to balance the number of electrons:
3Pb(s) → 3Pb²⁺(aq) + 6e⁻
2Fe³⁺(aq) + 6e⁻ → 2Fe(s)
Therefore, n = 6.
3. Plug the values into the formula: ΔG° = -6 * 96,485 * 0.090.
4. Calculate ΔG°: ΔG° = -51,960 J or -51.96 kJ.
The closest answer is (c) -52 kJ. So, the standard free-energy change at 25°C for this reaction is approximately -52 kJ.
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Related Questions
What concentration of OH is required to created a pOH of 1.3.
Answers
Answer:
0.0501
Explanation:
OH=10^-poH
OH=10^-1.3
=0.0501
a stream of air (21 mole% o2, the remainder n2) flowing at a rate of 10.0 kg/hr is mixed with a stream of co2. the co2 enters the mixer at a rate of 10.0 m3/hr at 150oc and 1.5 bar. what is the mole percent of co2 in the product stream?
Answers
The mole percent of CO2 in the product stream can be determined using the given information.
First, let's find the number of moles of CO2 entering the mixer. We can use the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
Given that the CO2 enters the mixer at a rate of 10.0 m3/hr at 150°C and 1.5 bar, we need to convert the temperature to Kelvin by adding 273.15 (150 + 273.15 = 423.15 K) and convert the pressure to Pascal (1.5 bar = 150,000 Pa).
Using the ideal gas law, we can rearrange it to solve for n: n = PV / RT. Plugging in the values, we get n = (150,000 Pa * 10.0 m3) / (8.314 J/(mol·K) * 423.15 K).
Next, let's calculate the number of moles of N2 in the air stream. We know that the air stream is 21 mole% O2, so the remaining 79 mole% is N2. Since the total moles of both gases sum up to 100%, we can assume that the mole percent of N2 in the air stream is also 79%.
Now, let's calculate the total number of moles in the product stream. This is the sum of the moles of CO2 and the moles of N2 in the air stream.
Finally, we can determine the mole percent of CO2 in the product stream by dividing the moles of CO2 by the total moles in the product stream and multiplying by 100.
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ice added to a hot soup for the purpose must be made from what type of water
Answers
When adding ice to a hot soup, it is generally recommended to use ice made from potable or drinkable water.
The water used to make the ice should be clean and free from any contaminants that could affect the taste or safety of the soup.
It is advisable to use filtered or purify water to make the ice to ensure that it is of good quality. This helps prevent any unwanted flavors or impurities from transferring to the soup.
Using tap water can also be acceptable if it meets the drinking water standards in your area and is considered safe for consumption. However, if you have concerns about the quality of your tap water, using filtered water is a safer option.
Ultimately, the goal is to add ice made from water that is safe and of good quality to avoid any negative impact on the taste or safety of the soup.
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if the illustration of thomson's atom represents a neutral atom, what must be true about the total amount of positive charge and the total amount of negative charge?
Answers
The illustration of Thomson's atom represents a neutral atom. In this case, the total amount of positive charge and the total amount of negative charge must be equal. This means that there are equal numbers of protons and electrons in the atom. This is what makes the atom neutral.
What is a neutral atom?A neutral atom is an atom that has no electrical charge. An atom is neutral because it has the same amount of positively charged protons and negatively charged electrons. The nucleus of an atom contains protons, which are positively charged particles. Electrons, which are negatively charged particles, are located in the atom's electron cloud around the nucleus.
Electrons, protons, and neutrons are the three components of atoms. Electrons are negatively charged, protons are positively charged, and neutrons have no charge. Electrons are found outside the nucleus of the atom and are continually moving at high speeds.
In summary, if the illustration of Thomson's atom represents a neutral atom, then the total amount of positive charge and the total amount of negative charge must be equal. This means that there are equal numbers of protons and electrons in the atom. This is what makes the atom neutral.
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How many protons are in this atom if it has a balanced charge?
- 0
- 2
- 4
- 6
Answers
Answer:
6
Explanation:
If there are 6 electrons and it has a balanced charge, there also must be six protons.
convert 0.020 kg of Sn to mg of Sn
Answers
hope that helps !
please I need help ASAP
Lead nitrate decomposes on heating as indicated in Equation. 2Pb(NO3)2(s) 2PbO(s) + 4NO₂(g) + O₂(g) (4.8) If a volume of 112 cm³ of oxygen gas was collected at STP when a sample of lead nitrate was completely decomposed by heating, calculate the; (a) mass of the lead nitrate sample. (b) mass of lead(II) oxide produced. (c) Volume of nitrogen dioxide gas produced at STP. (Pb=207, N = 14, O=16; molar volume of gas at STP = 22.4 dm³)
Answers
Answer:
To solve this problem, we'll need to use stoichiometry and the molar ratios from the balanced chemical equation. Here's how you can calculate the values:
(a) Mass of the lead nitrate sample:
From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 1 mole of oxygen gas (O2). We know that the volume of oxygen gas collected is 112 cm³, which is equal to 112/1000 = 0.112 dm³ (converting cm³ to dm³).
According to the molar volume of gas at STP (22.4 dm³), 1 mole of any gas occupies 22.4 dm³ at STP. Therefore, the number of moles of oxygen gas can be calculated as:
moles of O2 = volume of O2 / molar volume at STP
moles of O2 = 0.112 dm³ / 22.4 dm³/mol = 0.005 mol
Since 2 moles of lead nitrate produce 1 mole of oxygen gas, we can determine the number of moles of lead nitrate as:
moles of Pb(NO3)2 = 2 * moles of O2
moles of Pb(NO3)2 = 2 * 0.005 mol = 0.01 mol
To calculate the mass of the lead nitrate sample, we'll use its molar mass:
mass of Pb(NO3)2 = moles of Pb(NO3)2 * molar mass of Pb(NO3)2
mass of Pb(NO3)2 = 0.01 mol * (207 g/mol + 2 * 14 g/mol + 6 * 16 g/mol)
mass of Pb(NO3)2 = 0.01 mol * 331 g/mol
mass of Pb(NO3)2 = 3.31 g
Therefore, the mass of the lead nitrate sample is 3.31 grams.
(b) Mass of lead(II) oxide produced:
From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 2 moles of lead(II) oxide (PbO). So, the number of moles of PbO produced is equal to the number of moles of Pb(NO3)2.
mass of PbO = moles of PbO * molar mass of PbO
mass of PbO = 0.01 mol * (207 g/mol + 16 g/mol)
mass of PbO = 0.01 mol * 223 g/mol
mass of PbO = 2.23 g
Therefore, the mass of lead(II) oxide produced is 2.23 grams.
(c) Volume of nitrogen dioxide gas produced at STP:
From the balanced equation, we can see that 2 moles of lead nitrate (Pb(NO3)2) produce 4 moles of nitrogen dioxide gas (NO2). So, the number of moles of NO2 produced is twice the number of moles of Pb(NO3)2.
moles of NO2 = 2 * moles of Pb(NO3)2
moles of NO2 = 2 * 0.01 mol = 0.02 mol
Using the molar volume of gas at STP, we can calculate the volume of nitrogen dioxide gas:
volume of NO2 = moles of NO2 * molar volume at STP
volume of NO2 = 0.02 mol * 22.4 dm³/mol = 0.448 dm³
Therefore, the volume of nitrogen dioxide gas
is all plastic polymers?
Answers
Polymers are all plastics, but not all plastics are polymers. Plastic is a particular type of polymer. Plastics are long-chain molecules formed by large monomers, whereas polymers are uniform molecules formed by small monomers.
What is polymer ?A polymer is a substance or material made up of very large molecules known as macromolecules that are made up of many repeating subunits. Both synthetic and natural polymers play important and ubiquitous roles in everyday life due to their broad range of properties.
All plastics are polymers, but not all polymers are plastic, implying that plastic is a subdivision of polymer. Polymers can be natural or synthetic, but plastics are synthetic.
All plastics are polymers, but not all polymers are plastics. The composition, physical properties, and applications of polymers and plastics are examined below to provide a clear explanation of the differences between the two.
Thus, Polymers are all plastics, but not all plastics are polymers. Plastic is a particular type of polymer.
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Which statement about the effect of concentration and temperature on the rate of a reaction is NOT correct?
If the concentration of a reactant is increased, the rate of reaction increases because more particles have sufficient energy to react.
If the concentration of a reactant is increased, the rate of reaction increases because more collisions between particles per second.
If the temperature is increased , the rate of reaction increases there are more collisions between particles per second.
If the temperature is increased , the rate of reaction increases because more particles have sufficient energy to react.
Answers
All of the statements regarding the effect of concentration and temperature on the rate of a reaction are correct. Therefore, there is no statement that is NOT correct.
When the concentration of a reactant is increased, the rate of reaction increases because there are more particles available for collisions, and therefore, more successful collisions per unit time. Similarly, when the temperature is increased, the rate of reaction increases because there are more collisions between particles, and they have more kinetic energy, which increases the chances of successful collisions.
The rate of a reaction refers to the change in the concentration of reactants or products per unit time. It is a measure of how quickly a chemical reaction is proceeding.
The rate of a reaction can be determined by measuring the change in concentration of any reactant or product over time, and it is usually expressed in units of mol/L/s or M/s. The rate of a reaction depends on various factors such as the concentration of reactants, temperature, pressure, and the presence of catalysts.
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--The given question is incomplete, the complete question is
"Which statement about the effect of concentration and temperature on the rate of a reaction is NOT correct? A) If the concentration of a reactant is increased, the rate of reaction increases because more particles have sufficient energy to react. B) If the concentration of a reactant is increased, the rate of reaction increases because more collisions between particles per second. C) If the temperature is increased , the rate of reaction increases there are more collisions between particles per second. D) If the temperature is increased , the rate of reaction increases because more particles have sufficient energy to react."--
If 12.3 mol HCl are produced in this reaction, how many grams of sodium sulfate are produced?
Answers
ANSWER
The mass of Na2SO4 is 874g
EXPLANATION
Given that;
The number of moles of HCl is 12.3 mol
Follow the steps below to find the mass of sodium sulfate produced
Step 1; Write a balanced equation for the reaction
\(\text{ 2NaCl + H}_2SO_4\text{ }\rightarrow\text{ 2HCl + Na}_2SO_4\)In the reaction above, 2 moles of NaCl react with 1 mole of H2SO4 to give 2 moles of HCl and 1 mole of Na2SO4
Let the number of moles of Na2SO4 be x
\(\begin{gathered} \text{ 2 moles HCl }\rightarrow\text{ 1 mole Na}_2SO_4 \\ \text{ 12.3 moles HCl }\rightarrow\text{ x moles Na}_2SO_4 \\ \text{ Cross multiply} \\ \text{ 2 moles HCl }\times\text{ x moles Na}_2SO_4\text{ }=\text{ 1 mole Na}_2SO_4\text{ }\times\text{ 12.3 mole HCl} \\ \text{ Isolate x} \\ \text{ }\times\text{ }=\text{ }\frac{1\text{ mole Na}_2SO_4\times12.3mol\cancel{HCl}}{2moles\cancel{HCl}} \\ \text{ } \\ \text{ x = }\frac{1\text{ }\times\text{ 12.3}}{2} \\ \text{ x = 6.15 moles} \end{gathered}\)The number of moles of Na2SO4 is 6.15 moles
Step 3; Find the mass of Na2SO4 using the below formula
\(\text{ mole = }\frac{\text{ mass}}{\text{ molar mass}}\)Recall, that the molar mass of Na2SO4 is 142.04 g/mol
\(\begin{gathered} \text{ mass = mole }\times\text{ molar mass} \\ \text{ mass = 6.15 }\times\text{ 142.04} \\ \text{ mass = 873.546} \\ \text{ mass = 874g Na}_2SO_4 \end{gathered}\)Therefore, the mass of Na2SO4 is 874g
how many electrons does the atom have
Answers
Answer:
8
Explanation:
Underline the media appropriate for extinguishing fires involving cyclohexane or the isomeric methylpentenes formed by dehydration of the corresponding alcohols: water, carbon dioxide, chemical powder, foam.
Answers
Water and foam are not suitable. Carbon dioxide and chemical powder are appropriate.
Cyclohexane and methylpentenes are combustible fluids, so the media suitable for stifling flames including them ought to be non-polar and not water-based. Water ought not be utilized as it can spread the fire and may make the holder crack because of the abrupt expansion in pressure.
Carbon dioxide is a reasonable media, as it is non-polar and can dislodge oxygen, in this way covering the fire. Substance powder is likewise a fitting media as it can retain the fuel and keep it from responding with oxygen.
Froth is one more reasonable media, as it can frame an obstruction on the outer layer of the fluid, keeping the fuel fumes from touching off. Thusly, the media proper for smothering flames including cyclohexane or the isomeric methylpentenes shaped by parchedness of the relating alcohols are carbon dioxide, synthetic powder, and froth.
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A tank contains 1500 L of argon gas. The pressure is 11690 kPa and the temperature is 35ºC. How many moles of
argon are in the tank?
Show your work
Answers
Answer: 6,847.7 moles of Argon Gas
Explanation:
For this question, you need to use the Ideal Gas Equation (PV = nRT).
P is pressure (commonly in kPa or atm)V is volume occupied by the gas (in L)n is the number of moles, aka what we're trying to find here.R is the Ideal gas constant (8.314 (kPa*L)/(mol*K), or 0.0821 (atm*L)/(mol*K)T is the temperature (in Kelvins (K). In order to convert from Celsius to Kelvin, just add 273.)We can rearrange this equation to calculate the number of moles:
n = PV/RT
Then, we can plug in the values (Caution: we have to use 8.314 for our Ideal gas constant since P is in kPa for this question)
...and we have our answer! 6,847.7 moles of Argon Gas.
Also, make sure to adjust to significant figures!
Answer:
6843.99 mol (2 d.p.)
Explanation:
To calculate the number of moles of argon in the tank, we can use the Ideal Gas Law.
Ideal Gas Law\(\boxed{PV=nRT}\)
where:
P is the pressure measured in kilopascals (kPa).V is the volume measured in liters (L).n is the number of moles.R is the ideal gas constant (8.31446261815324 kPa L mol⁻¹ K⁻¹).T is the temperature measured in kelvin (K).First convert the given temperature from Celsius to kelvin by adding 273.15:
\(\implies \sf T=35+273.15=308.15\;K\)
Therefore, the values to substitute into the equation are:
P = 11690 kPaV = 1500 LR = 8.31446261815324 kPa L mol⁻¹ K⁻¹T = 308.15 KRearrange the formula to isolate n:
\(\implies n=\dfrac{PV}{RT}\)
Substitute the values into the formula and solve for n:
\(\implies n=\dfrac{11690 \cdot 1500}{8.3144626... \cdot 308.15}\)
\(\implies n=\dfrac{17535000}{2562.10165...}\)
\(\implies n=6843.99073...\)
\(\implies n=6843.99\; \sf mol\;(2\;d.p.)\)
Therefore, there are 6843.99 moles of argon in the tank (to two decimal places).
What is the slope of the line shown below?
АУ
10
(6,9)
Ο Α.
COIN
7
OB
O B.
ON
-5
++
10
6
15
OC.
7
(0,-5)
-101
OD?
11
8
Answers
Answer:
\(\frac{7}{3}\)
Explanation:
Using two points to find the slope
The formula:
\(\frac{y_ {2} - y__1}{x_2-x_1}\)
The points:
\((0,-5)\)
\((6,9)\)
Plug the points in the formula; solve:
\(\frac{9-(-5)}{6-0}\)
\(=\frac{14}{6}\)
\(=\frac{14\div2}{6\div2}\)
\(=\frac{7}{3}\)
\(\bold{m=\frac{7}{3}}\)
Therefore, the slope is \(\frac{7}{3}\).
The Slope of this line is 3/7. Hence option B is correct.
What is Slope ?The slope is ratio of the rise to the run. You can determine the slope of a line from its graph by looking at the rise and run. One characteristic of a line is that its slope is constant all the way along.
The equation of the straight line is given by,
y = mx + c
here m is the slop of the line and c is the intercept, when line goes from the origin the intercept of the line is zero.
The line is straight in the space.
the slope of x-y coordinates is given by,
m = (y₂ - y₁) ÷ (x₂ - x₁)
In this given figure we have,
y₂ = 9
y₁ = -5
x₂ = 6
x₁ = 0
m = ?
m = (y₂ - y₁) ÷ (x₂ - x₁) = (9--5)/6 = 14/6 =7/3
Hence option D is correct.
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What is the relationships between Ha and Hb in the following structure? homeotopic enantiotopic diastereotopic none of the previous
Answers
The relationship between Ha and Hb in the given structure can be determined by analyzing their chemical environment. Based on the information provided, it is not possible to determine whether Ha and Hb are homeotopic, enantiotopic, or diastereotopic. Therefore, the correct answer is "none of the previous."
If Ha and Hb are in the same chemical environment and experience the same type of interactions with neighboring atoms, they are considered to be homeotopic. This means that they are chemically equivalent and will have the same chemical shift in an NMR spectrum.
On the other hand, if Ha and Hb are in different chemical environments and experience different types of interactions, they are considered to be diastereotopic. In this case, Ha and Hb will have different chemical shifts in an NMR spectrum.
If Ha and Hb are in different chemical environments but experience the same type of interactions with neighboring atoms, they are considered to be enantiotopic. Enantiotopic protons are related by a symmetry plane or an axis of symmetry in the molecule. They will have the same chemical shift in an NMR spectrum, but their signals may appear split differently due to the chiral environment.
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Write a formula that you can use in order to calculate the number of neutrons in an atom:
Number of Neutrons=____________________________
Answers
Answer:
number of neutrons = mass number - number of protons
Place These Bodies Of Our Solar System In Proper Order Of Formation
1.The Sun
2.Outer Planets
3.Planetesimals
4.Inner Planets
5. Solar Nebula
Answers
I believe that’s it
Consider the following neutral electron configurations in which n has a constant value. Which configuration would belong to the element with the most negative electron affinity, Eₐ? A. 5s² B. 5s²5p²
C. 5s²5ps⁵
D. 5s²5p⁶
Answers
The 5s²5ps⁵ configuration is the electron configuration of the element with the most negative electron affinity, Eₐ. Hence, option C is the correct answer.
The electron affinity (Eₐ) refers to the energy change when an atom or ion gains an electron to form a negatively charged ion. Elements with a higher electron affinity tend to have a greater attraction for an additional electron.
Among the given configurations, the electron configuration with the most negative electron affinity (Eₐ) would be the one that is closest to achieving a stable noble gas configuration. Noble gases have full electron shells, which makes them highly stable.
Let's analyze the given configurations:
A. 5s² - This configuration represents a noble gas configuration for strontium (Sr). It is not likely to have a highly negative electron affinity since it is already in a stable state.
B. 5s²5p² - This configuration represents oxygen (O). Oxygen is known to have a relatively high electron affinity, but it is not the most negative among the given options.
C. 5s²5p⁵ - This configuration represents fluorine (F). Fluorine has a very high electron affinity and tends to readily accept an additional electron. It is a strong candidate for the element with the most negative electron affinity among the given options.
D. 5s²5p⁶ - This configuration represents neon (Ne), which is a noble gas. Neon already has a stable electron configuration, so its electron affinity would not be expected to be highly negative.
Based on the analysis, option C (5s²5p⁵) represents the element with the most negative electron affinity, Eₐ.
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1) pbo+co-->pb+co2 which type of reaction is this?
a) redox reaction
b) oxidation reaction
c) reduction reaction
d) none of the above
Answers
PbO + CO → Pb + CO₂
Oxidation States of the Elements
Reactants Products
Pb +2 0
O -2, -2 -4
C +2 +4
Since the oxidation state/number of Pb decreased, it is being Reduced.
Since the oxidation state/number of C increased, it is being Oxidized.
∴ this is a Redox Reaction
_______ assisted Anton Raphael Mengs with the iconography of his ceiling fresco, Parnasus, in the Villa Albani.
A) Johann Winckelmann
B) Cardinal Albani
C) Jacques Louis David
D) Joshua Reynolds
Answers
Johann Winckelmann assisted Anton Raphael Mengs with the iconography of his ceiling fresco, Parnasus, in the Villa Albani. A) is the correct answer.
Johann Winckelmann (1717-1768) was a German art historian and archaeologist who is considered one of the pioneers of the discipline of art history. He is best known for his studies of ancient Greek and Roman art and his role in popularizing the neoclassical style in 18th-century Europe.
Winckelmann was born in Germany and studied theology, philosophy, and archaeology at several universities. He began his career as a tutor and librarian but eventually became a curator of antiquities for Cardinal Alessandro Albani in Rome. While in Rome, he studied ancient art and architecture extensively, publishing several influential works on the subject.
Winckelmann's approach to art history emphasized the importance of studying original ancient works and understanding the historical and cultural context in which they were created.
He believed that the study of ancient art could serve as a model for contemporary artists and inspire a revival of classical ideals in art and culture. Thus, the correct option is a.
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how many assymetric carbon atoms are present in the molecule shown? cl cl
Answers
2 asymmetric carbon atoms are present in the molecule shown.
Asymmetric carbon atoms, also known as chiral carbon atoms or stereogenic carbon atoms, are carbon atoms that are bonded to four different groups or atoms. They are important in organic chemistry because they give rise to molecular asymmetry and the existence of enantiomers.
The presence of an asymmetric carbon atom in a molecule leads to chirality, which is the property of having two non-superimposable mirror image forms (enantiomers). Enantiomers have identical physical and chemical properties, except for their interaction with other chiral molecules, such as in biological systems.
The existence of enantiomers is significant because they can exhibit different biological activities, pharmacological effects, and reactivities. For example, one enantiomer of a drug may be therapeutically effective, while its enantiomer could be biologically inert or even produce adverse effects.
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18. What is the molarity of a bleach solution containing 9.5 g of NaOCL per liter of bleach
Answers
Answer:
0,1276 M
Explanation:
Molair mass of NaOCl = 74,44 g/mol
You have 9,5 g/L.
You need to calculate with the molair mass, how many moles 9,5 g are:
9,5 g / 74,44 g/mol = 0,1276 mol
0,1276 mol / 1 L = 0,1276 M
The molarity of a bleach solution containing 9.5 g of NaOCL per liter of bleach is mathematically given as
M= 0.1276 M
What is the molarity of a bleach solution containing 9.5 g of NaOCL per liter of bleach?Generally, the equation for the Molar mass is mathematically given as
M=m/(g/mol)
Therefore
M=9,5 g / 74,44 g/mol
M= 0,1276 mol
Hence
M= 0.1276 M
In conclusion, the molarity
M= 0.1276 M
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Propenoic acid is an unsaturated carboxylic acid. Describe how you could show
that it is an unsaturated compound giving details of the test and the result.
Answers
Answer:
Tests for unsaturation involves addition across the multiple bonds in the unsaturated compound.
Explanation:
In organic chemistry, we define an unsaturated compound as any compound that contains a double or triple bond. These multiple bonds are also known as pi bonds.
There are two major tests for unsaturation which shall both be discussed here.
The first test for unsaturation is by the use of bromine water. The unknown sample is passed through a solution of bromine water which normally appears reddish brown. The bromine water becomes decolorized due to addition of bromine across the multiple bond. This is a standard test for unsaturation.
Secondly, unsaturated compounds decoulourize a solution of potassium permanganate when passed through it. This alone can not be used as a distinctive test for unsaturation.
Propenoic acid will give a positive test to the both reagents showing that it contains multiple bonds, in this particular instance, a double bond.
Question 5 (1 point)
Potassium Bromide is insoluble.
O True
O False
Answers
So i think its false
Answer:
False
Explanation:
KBR (potassium bromide) is soluble
Locke became one of the foremost advocates of
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Answer:
*ೃ: He became one of the foremost advocates of freedom of belief. John Locke is also known as the "Father of liberalism."
What can be said about 1 mole of Ag and 1 mole of Au?
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Explanation:
Avogadro's number. What can be said about 1 mol Ag and 1 mol Au? ... They contain the same number of atoms.
1 mole of Ag and 1 mole of Au contain the same number of particle. Therefore, option B is correct.
What is mole ?The International System of Units uses the mole (symbol: mol) as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022140761023 elementary entities.
A mole is defined as the mass of a substance that has the same number of elementary particles as there are atoms in precisely 12.000 g of 12C.
In the periodic chart, group 11 includes the chemical elements roentgenium (Rg), copper (Cu), silver (Ag), and gold (Au). However, no chemical tests have yet been done to demonstrate that roentgenium behaves similarly to the heavier homologue of gold.
Thus, option B is correct.
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Part 2: Determining Similarities
Using only the groups of the periodic table, choose one element that is chemically similar to each of the
following elements
Carbon
Cesium
Krypton
Magnesium
Aluminum
Bromine
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Answer:
Magnesium, strontium, and barium belong to group 2A of the periodic table.
consider the following saturated solution of calcium hydroxide. ca(oh)2 (s) ⇄ ca2 (aq) 2oh-(aq) what effects, if any, will adding ag have on the position of equilibrium?
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The addition of Ag to the saturated solution of calcium hydroxide will cause a shift in the position of equilibrium to the right, resulting in the formation of a precipitate of Ca(OH)2.
Adding Ag (silver) to the saturated solution of calcium hydroxide will result in the formation of a precipitate. This is because Ag+ ions react with OH- ions to form AgOH(s), which is insoluble in water. As a result, the concentration of OH- ions in the solution decreases, leading to a shift in the position of equilibrium to the right, according to Le Chatelier's principle.
Le Chatelier's principle states that when a system at equilibrium is subjected to a stress, it will shift to minimize the effect of that stress. In this case, the addition of Ag+ ions acts as a stress on the equilibrium. To minimize the effect of the stress, the system shifts to the right, favoring the formation of more Ca2+ and OH- ions.
As a result of this shift, more Ca2+ ions and OH- ions will be produced, and the concentration of Ca(OH)2 (s) will decrease. The solubility of calcium hydroxide decreases as a result of the reduced concentration of OH- ions. This leads to the formation of a precipitate of Ca(OH)2.
In conclusion, the addition of Ag to the saturated solution of calcium hydroxide will cause a shift in the position of equilibrium to the right, resulting in the formation of a precipitate of Ca(OH)2.
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Answer the following Question Down Below...
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The mass number of the atom is 21, the atomic number is 9, and the element is Fluorine. There are 9 protons, 9 electrons, 12 neutrons, and the elemental symbol is F.
Properties of an atomFor every atom:
Protons and neutrons are located in the nucleus and the addition of both equals the mass number of atoms.Electrons are located outside the nucleus, in orbitals.Neutral atoms have the same number of electrons and protonsIn the diagram:
Number of electrons = 9
Number of protons = 9
Number of neutrons = 12
Mass number = 12 + 9
= 21
Atomic number = number of protons
= 9
Element with atomic number 9 = Fluorine
Symbol of the element = F
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A beam of electrons, a beam of protons, a beam of helium atoms, and a beam of nitrogen atoms cach moving at the same speed. Which one has the shortest de-Broglie wavelength? A. The beam of nitrogen atoms. B. The beam of protons, C. All will be the same D. The beam of electrons. E the beam of helium atoms
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The beam of protons has the shortest de-Broglie wavelength if a beam of electrons, a beam of protons, a beam of helium atoms, and a beam of nitrogen atoms cach moving at the same speed.
Define De Broglie wavelength
The De Broglie wavelength, which is a wavelength present in all quantum mechanically manifested things and establishes the probability density of locating the object at a specific location in the configuration space, is said to be a manifestation of wave-particle duality. A particle's momentum is inversely correlated with its de Broglie wavelength.
For electrons,
λ = h/mv = h/(m * 4*10⁶ m/s) = 3.3 x 10⁻¹¹ m.
For protons,
λ = h/mv = h/(m * 4*10⁶ m/s) = 1.3 x 10⁻¹³ m.
For helium atoms,
λ = h/mv = h/(m * 4*10⁶ m/s) = 1.7 x 10⁻¹¹ m.
For nitrogen atoms,
λ = h/mv = h/(m * 4*10⁶ m/s) = 3.3 x 10⁻¹¹ m.
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