A gas mixture contains 50% helium and 50% methane by volume. What is the percent by weight of methane in the mixture.
A gaseous mixture contains 40% O_(2), 40% N_(2), 10% CO_(2), 10% CH_(4) by volume. Calculate the vapour density of the gaseous mixture.
A gaseous mixture is composed of equal number of moles of CH_4, C_2H_6 and C_2H_2 . Determine the average molecular mass of mixture (in amu)
A sample of polymer contains 30% molecules with a molecular mass 20,000 , 40% with molecular mass 30,000 and 30 % with 60,000 ." .What is the number average molecular mass of the polymer?
