1.35 liters of a 0.26 M solution of K2(MnO4) would contain 75 g of K2(MnO4).
To determine the volume of a 0.26 M solution of K2(MnO4) needed to contain 75 g of K2(MnO4), we need to use the formula:
Molarity (M) = moles of solute / volume of solution (L)
First, convert the mass of K2(MnO4) to moles using its molar mass:
Molar mass of K2(MnO4) = 2 * (39.1 g/mol for K) + (54.9 g/mol for Mn) + 4 * (16 g/mol for O) = 214.2 g/mol
Moles of K2(MnO4) = 75 g / 214.2 g/mol ≈ 0.35 moles
Now use the molarity formula to find the volume:
0.26 M = 0.35 moles / volume (L)
Volume (L) = 0.35 moles / 0.26 M ≈ 1.35 L
So, approximately 1.35 liters of a 0.26 M solution of K2(MnO4) would contain 75 g of K2(MnO4).
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What is the oxidizing agent in the reaction Fe+AgNO3-->Fe(NO3)3+AG?
A.AgNO3+
B. fe
C.Ag
D. Fe(NO3)3
The oxidizing agent in the reaction Fe + \(AgNO_3\)→ \(Fe(NO_3)_3\) + Ag is option a \(AgNO_3.\)
A redox reaction is one in which the oxidation states of two species undergo changes. Iron is oxidized in the reaction, while silver nitrate is reduced. One of the reactants is being reduced, whereas the other is being oxidized.The oxidizing agent is the species that is being reduced, and it is the species that accepts electrons.
Fe is being oxidized in this reaction. Therefore, it cannot be the oxidizing agent, nor can\(Fe(NO_3)_3\). In contrast, \(AgNO_3.\) is being reduced, which means it is accepting electrons. This is why\(AgNO_3.\) is the oxidizing agent.The correct answer is option a.
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4. This particle has a negative charge
proton
neutron
electrons
Answer:
Electrons have a negative charge.
what planet has a 16 hour day
Answer:
Neptune
Explanation:
Ciencias: una perturbación que transfiere energía de un lugar a otro que es ?
Answer:
Una onda es una perturbación que se propaga en el espacio, transportando energía pero no materia.
Explanation:
Over the past 60 years, the level of carbon dioxide in the atmosphere has been continually increasing. Many scientists hypothesize that this increase has led to an imbalance in the carbon cycle and a climatic trend known as global warming.
In which of the following ways could humans help the carbon cycle return to normal?
Cap volcanoes so that they do not release more carbon dioxide
cut down trees and other large plants that depend on carbon dioxide
reduce the amount of fossil fuels they combust
pump nitrogen and oxygen into the air to help rebalance the atmosphere
Answer:
C.
reduce the amount of fossil fuels they combust
Explanation:
study island
100 points help is appreciated
Apply: For a strong base, the concentration of hydroxide ions [OH–] is roughly estimated to be the same as the concentration of the base. The pH of a strong base is found with the equation pH = 14 + log10[OH–]. Based on their concentrations, find the pH of each of the strong bases. Check your answers with the Gizmo.
Answer
[Ca(OH)2] = ?
pH Ca(OH)2 = ?
[NaOH] = ?
pH NaOH = ?
Litmus is an example of an indicator, a substance that changes color depending on its pH (pH is a measure of the concentration of protons, or H+ ions). In the Titration Gizmo™, you will use indicators to show how acids are neutralized by bases, and vice versa.
To begin, check that 1.00 M NaOH is selected for the Burette, Mystery HBr is selected for the Flask, and Bromthymol blue is selected for the Indicator.
Calculate: Concentration is measured by molarity (M), or moles per liter. Brackets are also used to symbolize molarity. For example, if 0.6 moles of HNO3 are dissolved in a liter of water, you would say [HNO3] = 0.6 M.
Because HNO3 is a strong acid, it dissociates almost completely in water. That means the concentration of H+ is very nearly equal to that of HNO3.What is [H+] if [HNO3] is 0.01 M? 0.01 M
The pH of a solution is equal to the negative log of H+ concentration: pH = –log[H+]
Describe: The equation for the reaction of nitric acid (HNO3) and sodium hydroxide (NaOH) is shown on the bottom right of the Gizmo.
Measure: A titration can be used to determine the concentration of an acid or base by measuring the amount of a solution with a known concentration, called the titrant, which reacts completely with a solution of unknown concentration, called the analyte. The point at which this occurs is called the equivalence point.
Explain: A titration curve is a graph of pH vs. volume of titrant. The graph at right shows a typical titration curve for the titration of a strong acid by a strong base. (A strong base is one that has relatively high dissociation in water.)
According to theBrønsted-Lowry definition, an acid is a substance that is capable of donating a proton to another substance. A base is a substance that accepts protons. When an acid and a base are combined, the acid is neutralized as the base accepts the protons produced by the acid.One way to determine if a solution is acidic or basic is to use litmus paper, as shown above. There are two types of litmus papers: red and blue.How does litmus paper indicate an acid? Both strips turn red.
Emma created a table to describe the weather conditions in her area on a specific day. What units of measurement can be used for precipitation with mm or inches being correct?
Precipitation Air Temperature
25 °C
Sunny
The units of measurement that can be used for precipitation with mm or inches is precipitation, and air temperature.
What units is used to measure temperature and precipitation?The Temperature is known to be how hot or cold the air or atmosphere is. It is often measured by the used of a thermometer (in Celsius (C) or Fahrenheit (F), or Kelvin (K) ).
The unit of measurement for precipitation is said to be in millimeters. The unit is known to be in linear depth, that is in millimeters (for volume/area), or in kg m–2 (for the mass/ area).
See full question below
A is air pressure and is a temperature
O A is humidity and precipitation
O A is precipitation, and B is air temperature
O A is wind speed, and B is humidity
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What is the molarity when 25.0 g of the compound NaClO3 is placed in 85.0 mL of solution?
Answer: Molarity when 25.0 g of the compound \(NaClO_{3}\)is placed in 85.0 mL of solution is 294.12 M.
Explanation:
Given: Mass = 25.0 g
Volume = 85.0 mL (1 mL = 0.001 L) = 0.085 L
Molarity is the number of moles of a substance divided by volume in liter.
Hence, molarity of given solution is calculated as follows.
\(Molarity = \frac{mass}{Volume (in L)}\)
Substitute the values into above formula as follows.
\(Molarity = \frac{mass}{volume (in L)}\\= \frac{25.0 g}{0.085 L}\\= 294.12 M\)
Thus, we can conclude that molarity when 25.0 g of the compound \(NaClO_{3}\)is placed in 85.0 mL of solution is 294.12 M.
Michelle drove 300 miles in 6 hours. What was Michelle's speed?
30 miles per hour
80 miles per hour
50 miles per hour
60 miles per hour
Michelle drove 50 miles per hour
Explanation:
300 miles divided by 6 hours equals 50 miles per hour.
Miles per hour basically just means
\(\frac{Total number of miles}{total number of hours}\)
You can infer from the use of the word 'per' that you should divide the number of miles by the number of hours to get an average speed.
Similarly, to work out the number of miles driven you could say you travelled 50 miles per hour for 6 hours, so you would multiply 50mph x 6 hours to work the equation in reverse.
how does understanding the structure and function of the human brain help with diagnosis of disease
Answer:
one sec
Explanation:
24. What is the difference between a Polyatomic Ion and a Compound?
The difference between polyatomic ions and a compound is that polyatomic ions have positive or negative charge, while compounds have no net electrical charge.
Lithium (Li): 1s 2sB
A=
B=
Answer:
A = 2
B = 1
Explanation:
The atomic number of lithium is 3.
Its atomic mass is 7 amu.
It is present in group group 1.
It has one valance electron.
Lithium is alkali metal it form salts.
It is silvery soft metal. It has lowest density as compared to all other metals.
It react vigorously with water.
It is used in rechargeable batteries which are used in camera, mobile, laptops etc.
The electronic configuration of Li:
Li₃ = 1s² 2s¹
Thus,
A = 2
B = 1
According to its nutrition label, orange soda contains 49 g of sugar per 355-mL serving. If the density of the beverage is 1.043 g/mL, what is the percent sugar concentration in orange soda? (Hint: This is a two-step problem. First use the density to convert the 355-mL serving size to grams. Then calculate percent sugar in the beverage.)
The percent sugar concentration in orange soda is approximately 13.24%.
The volume of orange soda is given as 355 mL and its density is given as 1.043 g/mL. According to the nutrition label, there are 49 g of sugar in a 355 mL serving of orange soda.Using the density, we can convert the 355 mL volume into grams as follows:Volume = 355 mL; Density = 1.043 g/mL; Mass = ?To convert mL to g we need to multiply the volume with the density. Thus,Mass = Volume x Density= 355 x 1.043= 369.965 gThus, the mass of a 355 mL serving of orange soda is approximately 369.965 g.Next, we can calculate the percentage of sugar in the beverage as follows:Percent sugar concentration = (Mass of sugar / Total mass of beverage) x 100%Percent sugar concentration = (49 g / 369.965 g) x 100%Percent sugar concentration = 0.1324 x 100%Percent sugar concentration = 13.24%Therefore, the percent sugar concentration in orange soda is approximately 13.24%.
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help me pls :( determine the number of lone pair electrons on each H in NH3. Z of N=7, H=1
Answer:
The correct option is;
A. 0
Explanation:
The ammonia molecule has four pairs of electron whereby being located around the central nitrogen atom is tetrahedral in shape.
Of the four pairs of electrons, three are the bonds between nitrogen and hydrogen, such that there is only one lone pair of electron in the ammonia molecule that is located on the central nitrogen atom
The one electron on each hydrogen atoms and one of the electrons on the nitrogen atom form a bonding pair of electrons, that is the bonding pair of electrons are shared by the two nuclei, hydrogen and nitrogen
Since a lone pair are a pair of electrons attached to only one nucleus, the hydrogen in ammonia has no lone pair of electrons.
Group 13 elements tend to have what charge
Answer:
+3
Explanation:
cause im smart........
Answer:
+3
Explanation:
Because elements of group 13 have 3 valence electrons they loses them and show +3 charge
Like Al3+
Pleasee help me (15 points)
Answer:
Full moon.
Explanation:
This diagram shows a full moon because the sunlight is shining directly onto the side of the moon facing the earth in this instance.
Answer:
It is A
Explanation:
Explain why a climax community is not always a forest.
Scenario 1: The magnets are equal strength. Predict: How would the overall kinetic energy in the system change? Why?
Answer:
Magnetized objects move in the direction that reduces their magnetic potential energy. This is no different than the skate park.
Explanation:
-) Potassium is also in Group 1 of the periodic table. Potassium reacts with water in a similar
way to lithium. Write down two differences you would see between the reactions of
potassium and lithium with water.
Lithium react slowly with water while potassium react violently with water. potassium caught fire while lithium does not caught fire.
What is chemical reaction?Chemical reaction is defined as a procedure in which one or more compounds, known as reactants, are changed into one or more distinct substances, known as products.
It can also be defined as a process in which two or more molecules collide with the proper orientation and enough force to produce a new product.
There are mainly five types of reaction.
Synthesis reactionAcid base reactionRedox reactionDecomposition reactionPrecipitation reactionThus, Lithium react slowly with water while potassium react violently with water. potassium caught fire while lithium does not caught fire.
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what are the relationships among bond order, bond length, and bond energy?
Explanation:
When a bond is strong, there is a higher bond energy because it takes more energy to break a strong bond. This correlates with bond order and bond length. When the bond order is higher, bond length is shorter, and the shorter the bond length the greater the bond energy.
Please Help ASAP, any suggestions help
The correct answer is C. -0.76 V. the potential for this reduction half-reaction is -0.76 V relative to the standard hydrogen electrode.
The correct answer is C. -0.76 V.
The standard reduction potential, denoted as E°, is a measure of the tendency of a species to gain electrons and undergo reduction in a redox reaction. It is expressed in volts (V) and represents the potential difference between the reduction half-reaction and the standard hydrogen electrode (SHE), which is assigned a potential of 0 V.
In the given half-reaction:
Mg2+(aq) + 2e- → Mg(s)
The species undergoing reduction is Mg2+(aq), and it is being reduced to Mg(s) by gaining 2 electrons.
To find the standard reduction potential for this half-reaction, we can refer to standard reduction potential tables. These tables provide a reference for various half-reactions with respect to the standard hydrogen electrode.
In the table, the standard reduction potential for the Mg2+(aq) + 2e- → Mg(s) half-reaction is listed as -0.76 V. This means that Mg2+ has a tendency to be reduced, and the potential for this reduction half-reaction is -0.76 V relative to the standard hydrogen electrode.
Therefore, the correct answer is C. -0.76 V.
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HELPP ME
express with equations the transformations marked on the scheme
The reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Transformations :
1. CaO + H₂O⇒Ca(OH)₂
2. CaO + CO₂⇒CaCO₃
3. Ca(OH)₂+ 2HCl⇒CaCl₂+2H₂O
4. Ca(OH)₂+H₂CO₃⇒CaCO₃+2H₂O
5. CaCO₃⇒CaO+CO₂
A wavelength is defined as the distance from
A. Crest to crest
B. Trough to resting position
C. Crest to trough
D. Crest to resting position
When melting wax with the encaustic method, the artist adds what? multiple choice questions.
a. plaster
b. distilled water
c. pigment powder
d. egg yolk
The artist adds pigment powder when melting wax with the encaustic method.option c.
Encaustic painting involves the use of heated wax as a medium. To create colors and add pigmentation to the wax, artists typically incorporate pigment powder. This allows them to achieve a wide range of vibrant hues and create various effects on their artwork.
By adding pigment powder to the melted wax, artists can control the intensity and shade of the colors they desire, enhancing the visual appeal and artistic expression of their encaustic paintings.
In encaustic painting, the addition of pigment powder to the melted wax provides the artist with a versatile and flexible medium for color manipulation. The powder is mixed into the molten wax until it is thoroughly blended, ensuring even distribution of the pigments.
This process allows artists to achieve different levels of transparency, opacity, and saturation in their artwork. The use of pigment powder in encaustic painting enables artists to create intricate details, textured surfaces, and expressive brushwork, adding depth and complexity to their compositions.
Overall, pigment powder is an essential component in the encaustic method, providing artists with a means to bring their artistic visions to life through a rich and visually captivating color palette.option c.
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How much work is done when 7 N of force is used to push a stalled motorbike 5 m?
Hey there!
========================================| Welcome to Physics |
Topic for Discussion - Work
========================================What is "work" when it comes to Physics?"
In physics, work is the energy transferred to or from an object via the application of force along a displacement. In short, it is the force applied to an object over distance.
The formula for work is \(W=Fs\).
\(W=work\)\(F=force\)\(s=displacement/distance\)Given the scenario above, there is "a force of 7 N on a stalled motorbike for a distance of 5 meters (m)". Now, we have to "determine the amount of work" that is being done during this
Knowing our formula for work, simply apply the given data in the scenario using the formula to determine the work being done.
\(W=Fs\)
\(F=7\)
\(s=5\)
\(W=7*5\)
\(W=35\)
Hence, the work being done in the given scenario would be 35.
__________________________________________________
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What type of bond forms between two atoms
with similar EN values (between nonmetals)?
covalent or ionic
Answer:
I'm sure it's covalent bond hope this helps
Saturated steam at 0. 276MPa (Tsat-1310C) flows inside a steel pipe having an inside diameter of 2. 09cm and an outside diameter of 2. 67cm. The convective heat transfer coefficients on the inner and outer pipe surfaces may be taken as 5680 W/m2 K and 22. 7W/m²K respectively. The surrounding air is at 294K. Find the overall heat transfer coefficient, U. (W/m. K) and heat loss per meter (W/m) of this bare pipe. If now this pipe is covered with 3. 8cm thickness of 85% magnesia insulation, find the new overall heat transfer coefficient U beat loss of this pipe per m length and thereby estimate the percent reduction in heat loss due to insulation Take k values of steel=42. 9W/mK and 85% magnesia=0. 0675W/m. K
The overall heat transfer coefficient, U, is the sum of the individual heat transfer coefficients on the inner and outer surfaces of the pipe. To find U, we need to calculate the individual heat transfer coefficients and then sum them.
First, let's calculate the individual heat transfer coefficient on the inner surface of the pipe. We can use the convective heat transfer coefficient formula:
h_inner = 5680 W/m^2 K
Next, let's calculate the individual heat transfer coefficient on the outer surface of the pipe. Again, we can use the convective heat transfer coefficient formula:
h_outer = 22.7 W/m^2 K
Now, let's find the overall heat transfer coefficient, U:
U = (1 / h_inner + 1 / h_outer)^-1
Substituting the values we have:
U = (1 / 5680 + 1 / 22.7)^-1
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How much heat is required to vaporize 166g of water at it's boiling point, if water's heat of vaporization is equal to 40.7kJ/mol?
___________________________kJ
Answer:
375.3KJ
Explanation:
The following data were obtained from the question:
Mass of water = 166g
Heat of Vaporisation (ΔHv) = 40.7kJ/mol
Heat (Q) =..?
Next, we shall determine the number of mole in 166g of water. This is illustrated below:
Mass of H2O = 166g
Molar mass of H2O = (2x1) + 16 = 18g/mol
Number of mole = Mass/Molar Mass
Number of mole of H2O = 166/18
Number of mole of H2O = 9.22 moles.
Now, we can obtain the heat required to vaporise the water as shown below:
Q = n·ΔHv
Q = 9.22 mol x 40.7kJ/mol
Q = 375.3KJ
Therefore, the heat required to vaporise the water is 375.3KJ.
what is the mole fraction of water in a solution that has 1.0 mole of sugar (342.3 g/mol) dissolved in 0.45 l of water (450 g; about 25 moles)?
The Mole Fraction of water in a solution is 0.961.
The Mole Fraction is the product of the molecular weight of one component divided by the molecular weight of the entire mixture. When two components with reactive natures are combined, it is quite helpful. The mole fraction is the ratio of the two elements.All of the mole fractions that are present in the given mixture add up to one.XA + XB = 1.The mole percentage is produced by multiplying the mole fractions by 100.The expression "mole fraction" has no units or dimensions.\(Mole=\frac{H2O}{Sugar+H2O}\)Mole= 25/1 +25=0.961
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Which amino acid is most likely to participate in hydrogen bonding with water? To answer this you will need to look at the R-groups (.e. side chains) of each the amino acids. Use can use the slide in the lecture notes or go to Fig. 4.2 (Structures of the 20 amino acids) found in the text book. a. asparagine b. leucine c. valine d. alanine e. phenyilanine
Asparagine is an amino acid that is most likely to participate in hydrogen bonding with water due to the presence of a polar, hydrophilic side chain ( -CONH2). The other amino acids listed are nonpolar and hydrophobic.
The Role of Asparagine in Hydrogen Bonding with WaterAsparagine is an amino acid that contains a polar, hydrophilic amide side chain (-CONH2), making it the most likely amino acid to participate in hydrogen bonding with water. Hydrogen bonding occurs between the partially positive hydrogen atoms of water and the partially negative oxygen or nitrogen atoms of asparagine. The polar nature of the asparagine side chain allows it to interact with the polar water molecules, forming hydrogen bonds that help to stabilize the protein structure. This is particularly important in proteins that are located on the surface of cells or in extracellular spaces, as these regions are often exposed to water and require stable structures to maintain their function. In contrast, amino acids such as leucine, valine, alanine, and phenylalanine have nonpolar, hydrophobic side chains that do not participate in hydrogen bonding with water. These hydrophobic amino acids are more likely to be found in the interior of proteins, where they can interact with other nonpolar amino acids and help to stabilize the protein structure through hydrophobic interactions.
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