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Evgen [1.6K]
3 years ago
6

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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Answer:

the volume of a set of keys is 6.75ml

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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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hope this helps!
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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

3 0
3 years ago
For which gases does the ratio of PV to RT equal a constant?
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__NH3 + __O2 → __NO + __H2O<br> How many moles of water are produced from<br> 2.48 g of oxygen?
Dennis_Churaev [7]
I hope this helps in some way. I forgot to mention that the question states they want to find THE NUMBER OF MOLES for H2O. Yherefore, you would want mol of H2O on top.

4 0
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