Answers
The order of increasing bond length is d) c-f < c-cl < c-s
The bond length of a covalent bond is determined by the size of the atoms involved and the strength of the bond. The size of the atoms involved in the c-f, c-s, and c-cl bonds are carbon, fluorine, sulfur, and chlorine, respectively. Carbon and fluorine are smaller atoms, while sulfur and chlorine are larger atoms. Therefore, the c-f bond will be the shortest bond.
The strength of the covalent bond is determined by the electronegativity of the atoms involved. Fluorine has the highest electronegativity of all the elements, followed by chlorine and then sulfur. Therefore, the c-f bond will be the strongest bond. The c-cl bond will be the second strongest bond, and the c-s bond will be the weakest bond.
Given these facts, the order of increasing bond length is c-f < c-cl < c-s. The c-f bond will be the shortest and strongest bond, followed by the c-cl bond and then the c-s bond.
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Related Questions
Becca is a forensic technician analyzing the fragments of a window. She sees that there is a hole in the window, and that the outside hole is smaller than the inside hole. What might she deduce from this information?
Answers
The observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.
From the observation that the hole in the window is smaller on the outside than on the inside, Becca, as a forensic technician, might deduce the following:
The hole was caused by an impact from the outside: The smaller outside hole suggests that the force that created the hole originated from the outside and exerted more pressure on the window surface facing inward.
The object causing the hole was larger on the inside: The discrepancy in hole sizes implies that the object that struck the window had a larger size or diameter on the inside, and as it penetrated the glass, it compressed or fragmented the glass, resulting in a larger hole on the inside.
The object may have passed through the window: The difference in hole sizes indicates that the object may have penetrated the window, potentially passing through to the inside. This could suggest a break-in or an incident involving the window being struck from the outside.
Overall, the observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.
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Consider the elements: Na, Mg, Al, Si, P.
a. Which element has the lowest second ionization energy?
b. Which element has the smallest atomic radius?
c. Which element is least metallic?
d. Which element is diamagnetic?
Answers
Answer:
The elements mentioned in the series are Na, Mg, Al, Si, and P. It can be seen that all these elements are located in the same period. The atomic number of the mentioned elements are Na-11, Mg-12, Al-13, Si-14, and P-15.
a) There will be an increase in the ionization energy with the increase in the element's atomic number across a period. More energy is needed to withdraw an electron from a completely occupied shell in comparison to an incompletely occupied shell.
The atomic number of Na is 11. When one electron is withdrawn from Na, it gets converted into the inert gas configuration of Ne. Thus, it will require more energy to withdraw the second electron from Na. Hence, Na exhibits the lowest second ionization energy.
b) Across the period, with an increase in the element's atomic number, the atomic radii reduces from left to right. Thus, P exhibits the smallest atomic radius.
c) The metallic nature of the elements reduces from left to right across a period in the periodic table. Thus, P is the least metallic element.
d) Diamagnetic signifies towards the element that exhibits pair electrons in its sub-shells. The electronic configuration of Mg is,
1s2 2s2 2p6 3s2
In Mg, no unpaired electrons are present, while all the remaining elements mentioned exhibit unpaired electrons in their valence shell. Thus, Mg is the diamagnetic element.
100 cm³ of a gas at 740 mm pressure at a certain temperature is taken. What will be the volume of the same mass of gas at 780 mm pressure at the same temperature?
Answers
Answer:
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CBSE
Chemistry
Grade 11
The Gaseous State
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Answer
What volume will a gas occupy at 740mm pressure which at 1480 mm occupies 500 cc? Temperaturebeingconstant.
Last updated date: 30th Dec 2022
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Hint: Boyle in the mid 1600’s observed that the product of the pressure and volume of a gas are observed to be nearly constant provided that the temperature is kept constant. This is always true in the case of an ideal gas.
P×V=constant
This relationship between pressure and volume of an ideal gas is known as the Boyle's Law.
Complete answer:
Since it is given in the question that temperature can be assumed as constant, we can apply Boyle’s Law.
According to Boyle's Law we know that:
⇒P×V=constant
We can rewrite this as
⇒P1×V1=P2×V2
Where P1 is the pressure at the volume V1
P2 is the pressure at the volume V2
Thus from the given question we can say that:
P1 = 1480 mm
V1 = 500 cc
P2 = 740 mm
V2 = x
Thus we can rewrite the equation and substitute the above values and obtain the equation given below:
⇒V2=P1×V1P2
⇒V2=1480×500740
⇒V2=1000cc
Thus the volume of gas occupied at a pressure of 740 mm is 1000 cc.
Two asteroids are 75,000 m apart one has a mass of 8 x 10^7 N what is the mass of the other asteroid
Answers
The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg
To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:
F = (G * m1 * m2) / \(r^{2}\)
where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.
Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):
1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)
Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.
The question was incomplete. find the full content below:
Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid
A. 3.4 x \(10^{11}\) kg
B. 8.3 x \(10^{12}\) kg
C. 1.2 x \(10^{12}\) kg
D. 1.2 x \(10^{10}\) kg
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Just Lemons Lemonade Recipe Equation:
2 water + sugar + lemon juice - 4 lemonade
Mole conversion factors:
1 mole of water = 1 cup - 236.598
1 mole of sugar = 1 cup - 1982
1 mole of lemon juice = 1 cup - 229.96 €
1 mole of lemonade = 1 cup = 225.285
Analysis Questions
1. Based on taste observations only, which ingredients were in excess in the lemonade samples in
Activity One?
2. Based on the data in Activity Two, which excess ingredients are affecting the taste of the lemonade in
the sample batch?
3. What can Just lemons, Inc. do during production to reduce the amount of excess ingredients and
improve the taste of their lemonade?
4. Try to reduce the amount of leftover ingredients by changing the amount of one, two, or all three
starting ingredients. Show your stoichiometric calculations below.
5. During factory inspection, Just Lemons, Inc. discovered that a water valve to the lemonade mixing
station was not functioning. Once they repair it, more water will enter the mixing station. From what
you know about the limiting and excess ingredients for current lemonade production, what advice
would you give engineers about the upcoming increase in water?
Answers
Based on limiting and excess reactant, having an appropriate stoichiometric ratio will help maximize the quality of lemonade made by Just lemons Inc.
Making LemonadeLemonade is made using the following ingredients in the equation below:
2 water + sugar + lemon juice - 4 lemonadeWhich ingredient will affect the taste?Since both sugar and lemon juice have tastes, an excess of either of the two will affect the taste of lemonade.
Which excess ingredient is affecting the lemonade in sample batch?Since this is an activity, the ingredient affecting the lemonade will either be sugar or lemon juice.
What can Just lemons, Inc. do during production to reduce the amount of excess ingredients and improve the taste of their lemonade?Just lemons incorporated can acquire and use more accurate measurement equipments.
They can also employ a skilled technician.
What can be done to reduce the amount of leftover ingredients?The amount of leftover ingredients can be reduced by using an appropriate stoichiometry ratio of reactants.
What can be done by engineers about upcoming increase in water?Limiting reactants are used up in a reaction while excess reagents are leftover.
Either water, lemon juice or sugar is a limiting reactant.
Therefore, it would be best the engineers determine the limiting reactant so water will not be in excess.
Therefore, based on limiting and excess reactant, having an appropriate stoichiometric ratio will help maximize the quality of lemonade made by Just lemons Inc.
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Look at Periodic Table. Which
element has 7 valence
electrons and is in period 3?
A. Fluorine
B. Sulfur
C. Chlorine
D. Bromine
Answers
Cavendish bananas are a popular species among banana growers because there predictable . All these bananas are grown to have the exact same genetic structure. How's this possible? A.. The grow in the same ecosystem . B They are clones of the parent plant . C They got equal amounts of nutrients.D They grow only one time of the year. E They form from sexual reproduction
Answers
Answer:
B. They are clones of the parent plant
Explanation:
Define biotechnology. } List two advantages in the use of biotechnology
Answers
Advantages of biotechnology:
Improvement of plants and animal breeds to give a high yield of their products.
Pests and pathogen control in agriculture which will reduce the loss of yield in food crops.
Synthesis of biocatalyst which can be used for enhancing the reactions which can be carried out in vitro or laboratory conditions.
Sewage treatment or water recycling can be done with the help of transgenic microbes which have better efficiency and speed.
Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.
Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.
A solution contains 0.0440 M Ca2 and 0.0940 M Ag. If solid Na3PO4 is added to this mixture, which of the phosphate species would precipitate out of solution first?
A. Na3PO4.
B. Ag3PO4.
C. Ca3(PO4)2
When the second cation just starts to precipitate, what percentage of the first cation remains in solution?
Answers
Answer:
C. \(Ca_3(PO_4)_2\) will precipitate out first
the percentage of \(Ca^{2+}\)remaining = 12.86%
Explanation:
Given that:
A solution contains:
\([Ca^{2+}] = 0.0440 \ M\)
\([Ag^+] = 0.0940 \ M\)
From the list of options , Let find the dissociation of \(Ag_3PO_4\)
\(Ag_3PO_4 \to Ag^{3+} + PO_4^{3-}\)
where;
Solubility product constant Ksp of \(Ag_3PO_4\) is \(8.89 \times 10^{-17}\)
Thus;
\(Ksp = [Ag^+]^3[PO_4^{3-}]\)
replacing the known values in order to determine the unknown ; we have :
\(8.89 \times 10 ^{-17} = (0.0940)^3[PO_4^{3-}]\)
\(\dfrac{8.89 \times 10 ^{-17}}{(0.0940)^3} = [PO_4^{3-}]\)
\([PO_4^{3-}] =\dfrac{8.89 \times 10 ^{-17}}{(0.0940)^3}\)
\([PO_4^{3-}] =1.07 \times 10^{-13}\)
The dissociation of \(Ca_3(PO_4)_2\)
The solubility product constant of \(Ca_3(PO_4)_2\) is \(2.07 \times 10^{-32}\)
The dissociation of \(Ca_3(PO_4)_2\) is :
\(Ca_3(PO_4)_2 \to 3Ca^{2+} + 2 PO_{4}^{3-}\)
Thus;
\(Ksp = [Ca^{2+}]^3 [PO_4^{3-}]^2\)
\(2.07 \times 10^{-33} = (0.0440)^3 [PO_4^{3-}]^2\)
\(\dfrac{2.07 \times 10^{-33} }{(0.0440)^3}= [PO_4^{3-}]^2\)
\([PO_4^{3-}]^2 = \dfrac{2.07 \times 10^{-33} }{(0.0440)^3}\)
\([PO_4^{3-}]^2 = 2.43 \times 10^{-29}\)
\([PO_4^{3-}] = \sqrt{2.43 \times 10^{-29}\)
\([PO_4^{3-}] =4.93 \times 10^{-15}\)
Thus; the phosphate anion needed for precipitation is smaller i.e \(4.93 \times 10^{-15}\) in \(Ca_3(PO_4)_2\) than in \(Ag_3PO_4\) \(1.07 \times 10^{-13}\)
Therefore:
\(Ca_3(PO_4)_2\) will precipitate out first
To determine the concentration of \([Ca^+]\) when the second cation starts to precipitate ; we have :
\(Ksp = [Ca^{2+}]^3 [PO_4^{3-}]^2\)
\(2.07 \times 10^{-33} = [Ca^{2+}]^3 (1.07 \times 10^{-13})^2\)
\([Ca^{2+}]^3 = \dfrac{2.07 \times 10^{-33} }{(1.07 \times 10^{-13})^2}\)
\([Ca^{2+}]^3 =1.808 \times 10^{-7}\)
\([Ca^{2+}] =\sqrt[3]{1.808 \times 10^{-7}}\)
\([Ca^{2+}] =0.00566\)
This implies that when the second cation starts to precipitate ; the concentration of \([Ca^{2+}]\) in the solution is 0.00566
Therefore;
the percentage of \(Ca^{2+}\) remaining = concentration remaining/initial concentration × 100%
the percentage of \(Ca^{2+}\) remaining = 0.00566/0.0440 × 100%
the percentage of \(Ca^{2+}\) remaining = 0.1286 × 100%
the percentage of \(Ca^{2+}\)remaining = 12.86%
Which emission spectrum represents the copper?
A.) Spectrum A
B.) Spectrum B
C.) Spectrum C
Answers
Answer:b
Explanation:i just did it
What is the electron geometry and hybrid orbital of sio2
Answers
Answer:
linear electron and molecular geometry with a bond angle of 180 degrees and a hybridization of Sp
Explanation:
What does the Law of Conservation of Matter have to do with burning gasoline? Why is this crucial?
Answers
Zoe left her water bottle capped and in her bedroom. She came back some time later to realize that the bottle was “sweating” and left a ring of liquid on her nightstand
Explain thoroughly the science behind why Zoe’s water bottle is sweating
Answers
Answer:
Condensation
Explanation:
Zoe is quite keen to have noticed what we call condensation. Air contains many components, one of those being water vapor. Like how sugar is soluble in water, water can be said to be "soluble" in air. Water will evaporate into the air to a certain extent. The higher the temperature of the air, the more water the air can hold. If the air has more water that it can hold (potentially because of a temperature decrease), the extra water will come out of the air. Zoe's water bottle was cold, and because the air around Zoe's bottle had cooled down, the air can not hold as much water as it could when it was warm, so the air deposited the extra water in the form of liquid water onto the bottle, giving the illusion that her bottle was sweating.
please help me set up the conversion factors + the set up. thank you
Answers
Answer:
Guys’ search it up on math thank me later
Explanation:
dhsjdjsusysgtjghtd fjfhfhcchdh
0.2g of sand in two-third in liter of ethanol . What is the concentration in g per dm cube
Answers
The mass concentration of sand in the ethanol solution is 0.299 g/dm³.
What is the concentration in grams per dm³?To find the concentration in grams per cubic decimeter (g/dm³), we first need to convert the volume from liters to cubic decimeters (dm³). Since 1 liter is equal to 1 cubic decimeter, we can directly convert the volume.
Given:
Mass of sand = 0.2 g
Volume of ethanol = two-thirds liter
Converting volume to dm³:
1 liter = 1 cubic decimeter
two-thirds liter = (2/3) cubic decimeter = 0.67 dm³ (rounded to two decimal places)
Now we can calculate the concentration in g/dm³ by dividing the mass of sand by the volume in dm³:
Concentration = Mass / Volume
Concentration = 0.2 g / 0.67 dm³
Concentration ≈ 0.299 g/dm³ (rounded to three decimal places)
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The complete combustion of a hydrocarbon produces 90.36 g of CO2 and 46.25 g of H2O. What is the empirical formula of the hydrocarbon?
Answers
The key here is to realize that you're dealing with a hydrocarbon, that is, a compound that contains only carbon and hydrogen.
Notice that the products of this combustion reaction are carbon dioxide,
CO
2
, and water,
H
2
O
.
This tells you that all the carbon that was initially a part of the hydrocarbon will now be part of the carbon dioxide. Likewise, all the hydrogen that was initially a part of the hydrocarbon is now a part of the water.
This means that you can use the number of moles of water and carbon dioxide, respectively, to determine how many moles of carbon and of hydrogen were originally present in the hdyrocarbon.
So, for water you have
14.20
g
⋅
1 mole H
2
O
18.015
g
=
0.78823 moles H
2
O
and for carbon dioxide
34.71
g
⋅
1 mole CO
2
44.01
g
=
0.78868 moles CO
2
Now, you know that every mole of water contains 2 moles of hydrogen and 1 mole of oxygen, which means that the reaction produced
0.78823
moles H
2
O
⋅
2 moles H
1
mole H
2
O
=
1.5765 moles H
SInce every mole of carbon dioxide contains 1 mole of carbon and 2 moles of oxygen, it follows that the reaction also produced
0.78868
moles CO
2
⋅
1 mole C
1
mole CO
2
=
0.78868 moles C
Finally, to find the mole ratio that exists between carbon and hydrogen in the hydrocarbon, divide these values by the smallest one
For C:
0.78868
moles
0.78868
moles
=
1
For H:
1.5765
moles
0.78868
moles
=
1.999
≈
2
The empirical formula of the hydrocarbon will thus be
C
1
H
2
⇒
CH
2
0.5 pts This is a reaction that you can find the two half reactions for on a REDOX tower in your discussion manual: NAD+ +H2 --> NADH + 2H+
Group of answer choices
Which compound is the electron donor?
Which compound is the electron acceptor?
When the electron donor loses the electron it becomes:
When the electron acceptor accepts the electron it becomes:
Overall the electron travels from:
Answers
The electron donor is \(H_2\).
The electron acceptor is \(NAD^+\)
When the electron donor loses the electron, it becomes oxidized.
When the electron acceptor accepts the electron, it becomes reduced.
Overall, the electron travels from H to \(NAD^+\).
Oxidation and reductionOxidation is defined as:
Loss of electronsIncrease in oxidation numberLoss of hydrogenGain of oxygenReduction is defined as:
Gain of electronsDecrease in oxidation numberGain of hydrogenLoss of oxygenLooking at the reaction, \(NAD^+\) gained hydrogen or an electron to become NADH. this means that NADH has been reduced. The reducing agent or the electron donor is \(H_2\) .
Thus, the electron acceptor is \(NAD^+\). When the electron donor, \(H_2\), loses the electron, it becomes oxidized to \(H^+\).
When the electron acceptor, \(NAD^+\), accepts the electron, it becomes NADH.
This means that electron travels from \(H_2\) to \(NAD^+\)
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what is the product of a reaction 4-acetyl anisole with HI(t°C)?
Answers
Answer:
The reaction of 4-acetyl anisole (also known as p-methoxyacetophenone) with hydroiodic acid (HI) results in the cleavage of the O-methyl group of the anisole ring, leading to the formation of iodobenzene and acetophenone. The balanced equation for this reaction is C9H10O2 + HI → C6H5I + C8H8O.
So, the product of the reaction of 4-acetyl anisole with HI is a mixture of iodobenzene and acetophenone. The specific ratio of these products will depend on the reaction conditions, such as the temperature and concentration of the reactants.
It's worth noting that the reaction between 4-acetyl anisole and HI is an example of a nucleophilic aromatic substitution reaction, which involves the replacement of a leaving group (in this case, the O-methyl group) on an aromatic ring by a nucleophile (the iodide ion from HI).
Which statement best describes the polarity of the molecule Pl3?
Answers
Phosphorus triiodide is a nonpolar molecule.
Why is PI3 non polar?We have to note that the polarity of a molecule would have a lot to do with the shape of the molecule. In other words, the arrangement of the atoms in the molecules tell us if the molecule would be polar or not.
The three iodine atoms are symmetrically positioned around the center phosphorus atom because the molecule has a trigonal pyramidal structure. As a result, the three P-I bonds' respective dipole moments cancel out and provide a net dipole moment of zero.
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Which of the following statements is true about the sense of smell? Men and women smell the same number of odors. The amount of odors one can smell is unknown. Women tend to smell more odors than men. People can smell approximately 100 odors.
Answers
Answer:
the answer is C.) Women tend to smell more odors than men.
Explanation:
The statements is true about the sense of smell is women tend to smell more odors than men.
What is sense?Sense is defined as a biological system utilized by an organism for sensation, which is the process of acquiring information about the environment and responding to stimuli.
Sense organ is defined as a physiological part that is altered by a stimulus in such a way that it causes activation of associated sensory nerve fibers, which transmit specific impulses to the central nervous system, where they are processed as corresponding sensations.
It can also be defined as a portion of the body that allows you to feel the physical features of a scenario.
Ears, eyes, nose, tongue, skin are the five important sense organs of our body.
Thus, the statements is true about the sense of smell is women tend to smell more odors than men.
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need this ASAP
Which of these must be FALSE, in order for evolution by natural selection to occur?
A. Variation between individuals exists in a population.
B. Particular variations of traits are passed on from one generation to the next.
C. Resources are limited, leading to competition within the population.
D. The particular traits present in one generation have no effect on traits in the next generation.
thank you :D
Answers
Drag the red block out of the water and onto the scale to the right.Record it’s mass.Also record the level of the water while the block is removed.The mass of the block is g.When the block is removed from the water the water level is mL.
Answers
Answer:
2.5g and 25.5ml
Explanation:
Answer:
2.5 and 25.5
Explanation:
Calculate the volume of O2, at STP, required for the complete combustion of 125g octane (C8H18) to CO2 and H20
Answers
306.178 liters is the volume of O2 at STP, required for the complete combustion of 125g octane (\(C_{8}H_{18}\)) to \(CO_{2}\) and H20
To calculate the volume of \(O_{2}\) required for the complete combustion of octane (\(C_{8}H_{18}\)) to \(CO_{2}\) and \(H_{2}O\) at STP (Standard Temperature and Pressure), we need to consider the stoichiometry of the balanced chemical equation.
The balanced equation for the combustion of octane is:
\(C_{8}H_{18}\) + 12.5\(O_{2}\) -> 8\(CO_{2}\) + 9\(H_{2}O\)
From the equation, we can see that 1 mole of octane requires 12.5 moles of \(O_{2}\) to completely combust. The molar mass of octane (\(C_{3}H_{18}\)) is approximately 114.22 g/mol.
To calculate the moles of octane, we divide the given mass by the molar mass:
Moles of octane = 125 g / 114.22 g/mol ≈ 1.093 mol
Since the molar ratio between octane and \(O_{2}\) is 1:12.5, the moles of \(O_{2}\)required can be calculated as:
Moles of \(O_{2}\) = 1.093 mol * 12.5 ≈ 13.663 mol
Now, we can use the ideal gas law, PV = nRT, to calculate the volume of \(O_{2}\) at STP. At STP, the temperature is 273 K, and the pressure is 1 atm.
Using the molar volume of an ideal gas at STP (22.4 L/mol), the volume of \(O_{2}\) required is:
Volume of \(O_{2}\) = Moles of \(O_{2}\) * Molar volume = 13.663 mol * 22.4 L/mol ≈ 306.178 L
Therefore, approximately 306.178 liters of \(O_{2}\) at STP would be required for the complete combustion of 125 grams of octane (\(C_{8}H_{18}\)) to \(CO_{2}\) and \(H_{2}O\)
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Calculate the volume occupied by 35.2 g of methane gas (CH4) at 25°C and 1.0 atm. R = 0.08206 L*atm/Kxmol.
Answers
Answer:
53.7 L
Explanation:
The volume occupied by 35.2 g of methane gas at 25 °C and 1.0 atm. is 55.9 L.
Given to us is temperature, pressure, universal gas constant, and mass of methane gas, we need to find the volume occupied by the gas.
To calculate the volume occupied by the methane gas, we can use the ideal gas law equation:
PV = nRT
Where:
P = pressure (in atm)
V = volume (in liters)
n = number of moles
R = ideal gas constant (0.08206 Latm/(Kmol))
T = temperature (in Kelvin)
First, we need to convert the given temperature from Celsius to Kelvin:
T(K) = T(°C) + 273.15
T(K) = 25 °C + 273.15
T(K) = 298.15 K
Next, we calculate the number of moles of methane gas using its molar mass:
molar mass of CH₄ = 12.01 g/mol + 4(1.008 g/mol) = 16.04 g/mol
n = mass/molar mass
n = 35.2 g / 16.04 g/mol
n = 2.19 mol
Now we can substitute the values into the ideal gas law equation:
PV = nRT
V = (nRT) / P
V = (2.19 mol × 0.08206 Latm/(Kmol) ×298.15 K) / 1.0 atm
V = 55.9 L
Therefore, the volume occupied by 35.2 g of methane gas at 25 °C and 1.0 atm is 55.9 liters.
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If you have 25 moles of water, H2O, how many molecules of water do you have?
Answers
Answer:
The number of molecules of water us 1.50× 10²⁵ molecules
Explanation:
From N=nL
where L =avogadro number ( 6.02× 10^²³ entities)
The number of the molecules of water =1
n (amount of substance)=25 moles
hence (N) = 25×1×6.02×10^²³
=1.50×10²⁵ molecules of H2O
Think of the arrangement of an atom and how different elements behave when exposed to heat. How do fireworks operate? What is moving within the atom? In your response make sure that you use the terms: ground state, excited state, photon, wavelength, energy, emission spectra and orbital.
Answers
Explanation:
How Fireworks operate
Fireworks contain an explosive powder, along with a binding paste, mixed with the signature chemicals responsible for its bright colors. ... The wavelength, and so the color of the light emitted, is fixed by these energy differences, giving each substance a "fingerprint" line emission spectrum. When the fireworks explode, electrons within the atoms of these different elements absorb energy and get “excited” which causes them to move into the higher energy orbits. When they come down to lower energy orbits, photons are released which allow us to see the great colors during a fireworks show. The electrons of the aluminum atoms absorb heat energy and become excited. The excited energy level the of electrons are energy level 2 or n=2 and above. ... Then electrons of lose the energy and fall back down to ground state which at energy level .This is also how a firework works on an atomic level.
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A student places one piece of chalk into a bowl with vinegar and another into a bowl with water. The next day she observes that the chalk in the water is mostly unchanged but the chalk in vinegar has pieces missing.
Which option describes a process in nature similar to the experiment? A.
heavy rainfall causing a landslide
B.
rocks at the bottom of a waterfall
C.
acid rain falling on a limestone sculpture
D.
salt water waves rolling over a rocky shoreline
E.
moving water of a river bumping rocks against each other
Answers
Heavy rainfall causes a landslide. Hence, option A is correct.
What is a landslide?A landslide is defined as the movement of a mass of rock, debris, or earth down a slope.
Water can trigger landslides and mudslides because it alters the pressure within the slope, which leads to slope instability.
Consequently, the heavy water-laden slope materials (soil, rock, etc.) will succumb to the forces of gravity.
Hence, option A is correct.
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The SI unit of heat energy is
British Thermal unit
Joule
all of the above
Calorie
Answers
As an amount of energy (being transferred), the SI unit of heat is the joule (J).
electron configuration for zinc?
Answers
Explanation:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰
Answer:
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰
Explanation:
edg 2020
Based on a Kc value of 0.250 and the given data table, what are the equilibrium concentrations of XY, X, and Y , respectively?
Answers
From the solution that we have in the question;
The concentration of X and Y is 0.28 MThe concentration of XY is 0.32 MWhat is the equilibrium constant?The equilibrium constant, denoted as K, is a value that quantitatively represents the ratio of the concentrations of products to reactants at equilibrium in a chemical reaction.
It is a fundamental concept in chemical equilibrium.
The value of the equilibrium constant provides valuable information about the position of equilibrium and the relative concentrations of species involved in a chemical reaction.
Kc = [X] [Y]/[XY]
\(0.25 = (0.1 + x)^2/(0.5 - x)\)
\(0.25(0.5 - x) = (0.1 + x)^2\)
\(0.125 - 0.25x =0.01 + 0.2x + x^2\\ x^2 + 0.45x - 0.115 = 0\)
x = 0.18 M
The equilibrium amount of X and Y= 0.28 M and the equilibrium concentration of XY = 0.32 M
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Based on the answer to the question that we have;
A 0.28 M concentration of X and Y exists at equilibriumXY's concentration at equilibrium is 0.32 M.The equilibrium constantThe ratio of the product to reactant concentrations in a chemical reaction at equilibrium is represented quantitatively by the equilibrium constant, abbreviated as K.
It is a cornerstone of the theory of chemical equilibrium.
A chemical reaction's equilibrium position and the relative concentrations of the species involved can both be learned from the equilibrium constant's value.
Kc = [X][Y]/[XY]
\(0.25 = (0.1 + x)^2/(0.5 - x)\\0.25(0.5 - x) = (0.1 +x)^2\\0.125 - 0.25x = 0.01 +0.2x +x^2\\= 0.18 M\)
The equilibrium concentration of;
XY =0.5 - 0.18
=0.32 M
Then the equilibrium amount of
X and Y is
0.1 + 0.18= 0.28 M.
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