What is the volume at STP of 3.44 x 1023 molecules of CO2 gas?
a 25.1L
b 39.2 L
С
12.8 L
d 15.7 L

C. 12.8 liters.

Explanation:

The Standard Temperature and Pressure (STP) of a gas are 273.15 K and 100 kilopascals. From Avogadro's Law, a mole of carbon dioxide contains molecules. If we suppose that carbon dioxide behaves ideally, then the equation of state for ideal gas is:

(1)

(1b)

Where:

- Pressure, measured in pascals.

- Volume, measured in liters.

- Amount of molecules, no unit.

- Avogadro's number, no unit.

- Ideal gas constant, measured in pascal-liters per mole-Kelvin.

- Temperature, measured in Kelvin.

If we know that , , , and , then the volume of carbon dioxide at STP is:

Therefore, the correct answer is C.

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