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Reptile [31]
3 years ago
15

Assuming all volume measurements are made at the same temperature and pressure, how many liters of oxygen gas would it take to r

eact completely with 7.25 liters of hydrogen gas? show all of the work used to solve this problem. balanced equation: 2h2 (g) + o2 (g) yields 2h2 o(g)
Chemistry
1 answer:
tatiyna3 years ago
7 0
You don't have to worry about converting to moles and back to liters. You need to know about Gay-Lussac's law of combining volumes. Coupled with Avogadro's law which says that the moles of gas are proportional to the volume, all we have to do is:

2H2(g) + O2(g) -> 2H2O(g)
2L ..........1L ..........2L
7.25L .....3.63L .....7.25L

The only work is dividing 7.25 by 2. 
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3 years ago
A fuel tank holds 22.3 gallons of gasoline. If the density is 0.8206 g/mL, what is the mass in kilograms of gasoline in a full t
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Answer:

m=69.3kg

Explanation:

Hello!

In this case, since the density is computed by dividing the mass of the substance by its occupied volume (d=m/V), we first need to realize that 0.8206 g/mL is the same to 0.8206 kg/L, which means we first need to compute the volume in L:

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Then, solving for the mass in d=m/V, we get m=d*V and therefore the mass of gasoline in that full tank turns out:

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Best regards!

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