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3 years ago

Bob adds heat to a substance. When enough heat is added, A. its particles move closer together and the substance becomes a gas.

Chemistry

1 answer:

Elena L [17]3 years ago

6 0

Answer:

C. its particles move farther apart and the substance becomes a gas.

Explanation:

A. is wrong because moving closer together creates a solid, not a gas.

B. is wrong because moving father apart creates a gas, not solid.

C. is correct because moving farther apart creates a gas.

D. is wrong because when heat is added particles spread apart because they vibrate faster. Although, in a solid the particles are closer together.

- Just know the states of matter and how the particles move and that will help with this problem.

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3 years ago

A cubic piece of metal measures 2.50 cm on each edge. If the metal is nickel, whose density is 8.90 g/cm3, what is the mass of t

madreJ [45]

Volume of cube = a³

2.50 * 2.50 * 2.50 = 15.625 cm³

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mass = ??

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3 years ago

For many purposes we can treat propane (CH) as an ideal gas at temperatures above its boiling point of - 42°C. Suppose the tempe

fredd [130]

Answer: The final pressure is 0.81 kPa

Explanation:

The combined gas equation is,

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1$ = initial pressure of gas = 0.58 kPa

$P_2$ = final pressure of gas = ?

$V_1$ = initial volume of gas = v

$V_2$ = final volume of gas = $v-\frac{40}{100}\times v=0.6v$

$T_1$ = initial temperature of gas = $25^0C=(25+273)K=298K$

$T_2$ = final temperature of gas = $-22^0C=(-22+273)K=251K$

Now put all the given values in the above equation, we get:

$\frac{0.58\times v}{298}=\frac{P_2\times 0.6v}{251}$

$P_2=0.81kPa$

The final pressure is 0.81 kPa

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3 years ago

For which gases does the ratio of PV to RT equal a constant?

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Dennis_Churaev [7]

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