A 70.0-L steel tank at 20.0°C contains acetylene gas, C2H2, at a pressure of 1.39 atm. Assuming ideal behavior, how many grams of acetylene are in the tank? A 70.0-L steel tank at 20.0°C contains acetylene gas, C2H2, at a pressure of 1.39 atm. Assuming ideal behavior, how many grams of acetylene are in the tank? 4.04 g 105 g 12.9 g 1540 g

There are 105 grams of acetylene in the tank.

Explanation:

According to ideal gas equation:

P = pressure of gas = 1.39 atm

V = volume of gas = 70.0 L

n = number of moles = ?

R = gas constant =

T = temperature of gas in Kelvin =

Mass of ethylene , M = Moles × Molar mass = 4.04 mole × 26 g/mol =105g

Thus there are 105 grams of acetylene in the tank.

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