Question

2. Dichlorine monoxide gas reacts with fluorine gas, F2, to give a new unknown gas that contains CI, O and F. In an experiment you find that 0.1552 g of the new gas has a pressure of 17.20 mm Hg and a volume of 1850.0 mL at 21.00 °C. a) What is the identity of the unknown gas? Explain your answer. Show all calculations. s 972

Answer 1

mass of the new gas = 0.1552 g

pressure = 17.20 mmHg = 0.02263 atm

volume = 1850.0 ml = 1.850 L

Temperature = 21.00 C = 294 K

a.) we know that ideal gas equation, PV = nRT

or PV = (m/M)RT

M= mRT/PV

molar mass of the gas = (0.1552*0.0821*294)/(0.02263*1.850) = 89.48 g/mol.

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so, identity of the gas is it's molar mass that is 89.48 g/mol.