Homework Answers
Molar mass of CH4 = 16 g/mol
Molar mass of Cl2 = 71 g/mol
Molar mass of H2 = 2 g/mol
Molar mass of SF6 = 146.06 g/mol
Molar mass of Ne = 20.1 g/mol
Thus,
molar mass of SF6 > molar mass of Cl2 > molar mass Ne > molar mass CH4 > molar mass of H2
The higher the molar mass of a gas, the maximum of its curve lie at the lower molecular speed.
Thus, curve I stands for SF6, curve II for Cl2, curve III for Ne, curve IV for CH4, curve V for H2.
Hence, the curve labelled IV is CH4.
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