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yulyashka [42]
3 years ago
7

3. How many atoms in 3.91 moles of sodium?

Chemistry
1 answer:
Gala2k [10]3 years ago
3 0

Answer:

Explanation:

The formula for sodium is Na. It does not form a molecule in some way.

1 mol Na = 6.02*10^23 atoms

3.91 mol = x                                    Cross multiply

x = 3.91 * 6.02 * 10^23

x = 23.65 * 10^23

x = 2.365 * 10^24

Scientific notation is always expressed as a number 1 ≤ x < 10

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3 years ago
Explain why doesn’t the total pressure increase when more gas is added to the chamber?
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Pressure is inversely proportional to volume. Therefore, the effect of pressure change is opposite to the effect of volume change. So when more gas is added to the chamber the total pressure of the chamber doesn't increase.

<h3>What are the different relations between pressure and volume?</h3>
  • As the volume changes, the concentrations and partial pressures of both reactants and products change.
  • As the volume decreases, the reaction shifts to the reaction side with fewer gas particles.
  • As the volume increases, the reaction shifts to the side of the reaction containing more gas particles.
  • As the pressure increases, the equilibrium shifts towards reactions with fewer moles of gas.
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2 years ago
Imagine that it is a sunny day and you are looking at a building that has solar panels on the roof. Which of the following state
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Your answer should be:

B. The panels are absorbing a lot of light energy.

Explanation:

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8 0
3 years ago
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A. What is temperature really a measure of?
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When we measure<span> an object's </span>temperature<span>, we </span>measure<span> the average kinetic energy of the particles in the object. The higher the </span>temperature<span>, the faster the molecules of the substance move, on the average.

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3 years ago
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Nitric acid is usually purchased in a concentrated form that is 70.3% HNO3 by mass and has a density of 1.41 g/mL. How much conc
Marina CMI [18]

Answer:

The answer to your question is: 9 .43 ml of HNO3 70.3%

Explanation:

Data

Purity: 70.3%

density = 1.41g/ml

Volume = 1 l

Concentration = 0.12 M

Molecular weight = 1 + 14 + (16 x 3) = 63 gr

               63 gr of HNO3 ------------------1 mol of HNO3  or IM

                           x           -------------------              0.12 M

x = 0.12M x 63 /1 = 7.65 g of HNO3

Now, calculate volume

        density = mass / volume    and volume = mass/density

                               volume = 7.65 / 1.41 = 6.63 ml of HNO3

Now, consider purity  (it's and inver rule of three)

                          6.63 ml -----------------  100%

                              x       -----------------  70.3 %

           x =  (6,63 x 100)/70.3 = 9.43 ml of HNO3

8 0
4 years ago
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