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3 years ago

How are pressure and temperature related in terms of kinetic energy?

Chemistry

1 answer:

mylen [45]3 years ago

3 0

Answer:

As the temperature of the gas increases, the particles gain kinetic energy and their speed increases. This means that the particles hit off the sides more often and with greater force. Both of these factors cause the pressure of the gas to increase.

Explanation:

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Which represents the smallest percentage of earths water a.frozen water b. Ground water c. Salt water d.surface fresh water

ratelena [41]

ANSWER: Surface Fresh Water

Humans only use 0.3% of the water on earth. The other 99.7 percent is in the oceans, soils, icecaps, and floating in the atmosphere.

6 0

3 years ago

What is the mass of NaCl required to make 140 grams of a 12% solution of NaCl in water?

Dmitry_Shevchenko [17]

Answer: The mass of NaCl required to make 140 grams of a 12% solution of NaCl in water is 17 g.

Explanation:

Given: Mass of solution = 140 g

Mass percent = 12%

Formula used to calculate grams of solute are as follows.

$Grams of solute = \frac{grams of solution \times mass percent}{100 percent}$

Substitute the values into above formula as follows.

$Grams of solute = \frac{grams of solution \times mass percent}{100 percent}\\= \frac{140 g \times 12 percent}{100 percent}\\= 16.8 g\\= 17 g$

Thus, we can conclude that the mass of NaCl required to make 140 grams of a 12% solution of NaCl in water is 17 g.

6 0

3 years ago

How many milliliters of 2.15 wt% dimethylglyoxime solution should be used to provide a 50.0% excess for Reac- tion 7-2 with 0.99

Lilit [14]

This is an incomplete question, here is a complete question.

How many milliliters of 2.15 wt% dimethylglyoxime solution should be used to provide a 50.0% excess for Reaction 7-2 with 0.998 4 g of steel containing 2.07 wt% Ni? Assume that the density of the dimethylglyoxime solution is 0.790 g/mL.

Answer : The volume of solution is, 7.195 mL

Explanation :

First we have to calculate the mass of Ni.

Mass of Ni = $0.998g\times 2.07\% =0.998g\times \frac{2.07}{100}=0.0206g$

Now we have to calculate the moles of Ni.

$\text{Moles of }Ni=\frac{\text{Given mass }Ni}{\text{Molar mass }Ni}=\frac{0.0206g}{58.7g/mol}=0.0003509mol$

Now we have to calculate the moles of dimethylglyoxime.

As we know that 1 mole of Ni requires 2 moles of dimethylglyoxime.

So, 0.0003509 mole of Ni requires (0.0003509×2=0.0007018) moles of dimethylglyoxime.

For 50% excess reaction number of moles of dimethylglyoxime = 0.0007018 × 1.5 = 0.0010527 g

Now we have to calculate the mass of dimethylglyoxime.

$\text{ Mass of dimethylglyoxime}=\text{ Moles of dimethylglyoxime}\times \text{ Molar mass of dimethylglyoxime}$

Molar mass of dimethylglyoxime = 116.12 g/mole

$\text{ Mass of dimethylglyoxime}=(0.0010527moles)\times (116.12g/mole)=0.1222g$

Now we have to calculate the weight of solution.

As, 2.15 g of dimethylglyoxime present in 100 g of solution

So, 0.1222 g of dimethylglyoxime present in $\frac{100}{2.15}\times 0.1222=5.684g$ of solution

Now we have to calculate the volume of solution.

$Density=\frac{Mass}{Volume}$

$0.790g/mL=\frac{5.684g}{Volume}$

Volume of solution = 7.195 mL

Therefore, the volume of solution is, 7.195 mL

3 0

3 years ago

If the change in Gibbs free energy for a process is positive, the corresponding change in entropy for the universe will be

Gnesinka [82]

If the change in Gibbs free energy for a process is positive, the corresponding change in entropy for the universe will be positive.

<h3>What is Gibbs free energy?</h3>

This is defined as the energy used by a substance involved in a chemical reaction.

The Gibbs free energy and entropy has a direct relationship which is why a positive gibbs free energy will result in a corresponding positive entropy.

Read more about Gibbs free energy here brainly.com/question/9179942

4 0

3 years ago

Sodium Tetraborate, a naturally occurring mineral, is crushed into Borax. This is an example of a ________change. *

Ostrovityanka [42]

Answer:

Chemical Change

Explanation:

4 0

3 years ago