Question

please help me solve this question
a 55g sample of gaseous fuel mixture contains 0.51mole fraction of propane C3H8 ,the remainder of the mixture is butane C4H10 . what are the masses for propane and butane in the sample ?

Answer 1

set n =total moles of mixture
n1 = 0.51*n moles of propane
n2=0.49*n moles of butane
M(total)=55
M1+M2=55
n1*MM1+n2*MM2=55
substitude solve to n
calc M1 and M2...