Answer to Question #132034 in General Chemistry for Kay

Question

What volume is occupied by 3.00mol of argon gas at STP?

Also, what gas law does it obey(or is there any)?

Answer 1

QUESTION # 132034

What volume is occupied by 3.00mol of argon gas at STP?

Also, what gas law does it obey (or is there any)?

Answer

1.00mol occupies 22.4 dm³

3.00mol occupies ? dm³

Volume = (3.00mol × 22.4 dm³) ÷ 1.00mol

= 67.20 dm³

What gas law does it obey (or is there any)?

Answer

The gas law obeyed is the Avogadro’s law which state that under the same conditions of temperature and pressure, equal volumes of different gases contain an equal number of molecules. The Avogadro’s law therefore gives important information that molar volumes of all gases are the same at a given temperature and pressure. The molar gas volume at STP is 22.4 liters (22.4 dm³).