A rigid container holds 22.4L of an ideal gas at STP. How many moles of gas need to be added to the container to make
the pressure equal to 325 kPa?
1 mol +
mol

2.21

Explanation:

At STP, 1 mol of gas has a volume of 22.4 L, so we know we're starting with 1 mol of gas.

Since temperature and volume are held constant, the number of moles needed to reach 325 kPa is found with ideal gas law:

(325,000 Pa) (0.0224 m³) = n (8.314 Pa m³ / mol / K) (273.15 K)

Since we started with 1 mol, we need to add 2.21

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explanation:

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