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3 years ago

What will be the mass of 9.95 liters of propane gas (C3H8) at STP?

Chemistry

1 answer:

ivolga24 [154]3 years ago

4 0

Answer:

19.5g

Explanation:

Given parameters:

Volume of propane gas = 9.95L

Unknown:

Mass of propane gas = ?

Solution:

To solve this problem, find the number of moles first.

At STP;

22.4L of gas makes up 1 mole

9.95L of gas will have a $\frac{9.95}{22.4}$ = 0.44mole

So;

Mass of propane gas = number of moles x molar mass

Molar mass of propane = 3(12) + 8(1) = 44g/mol

Mass = 0.44 x 44 = 19.5g

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