A student has a sample of CO2 gas that has a mass of 22.0g a. explain how she would find the volume of the sample at STP.

b. what is the volume of 22.0g of CO2 at STP? Show your work.

The answer to question A is given below.

B. 11.2 L at STP.

Explanation:

From the question given above, the following data were obtained:

Mass of CO2 = 22 g

A. To obtain the volume of the sample of CO2 gas, we must calculate the number of mole in 22 g of CO2.

Finally, we shall determine the volume of the sample of CO2 gas occupied by the number of mole of the gas calculated for, knowing that 1 mole of any gas occupies 22.4 L at STP.

B. Determination of the volume of 22 g of CO2 at STP.

We'll begin by calculating the number of mole in 22 g of CO2. This can be obtained as follow:

Mass of CO2 = 22 g

Molar mass of CO2 = 12 + (2×16) = 12 + 32 = 44 g/mol

Mole of CO2 =?

Mole = mass /Molar mass

Mole of CO2 = 22/44

Mole of CO2 = 0.5 mole.

Finally, we shall determine the volume occupied by 0.5 mole of CO2 at STP. This can be obtained as follow:

Recall:

1 mole of CO2 occupies 22.4 L at STP.

Therefore, 0.5 mole of CO2 will occupy = 0.5 × 22.4 = 11.2 L at STP.

Thus, 22 g of CO2 occupies 11.2 L at STP.

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