Chemistry question below?

Question

Ethylene(C2H4) can be prepared by heating hexane (C6H14) at 800 C.

C6H14---> C2H4 + other products

If the percent yield of ethylene production is 42.5 %, what mass of hexane must be reacted to produce 481 g of ethylene?

Answer 1

the equation should be balanced

C6H14---> 3C2H4 and in molecular weight (C6H14=84, C2H4 = 28)

86--->3*28

86g of hexane correspond to 84 g ethylene

86g of hexane yield 84*42.5/100= 35.1g of ethylene produced

so 1g of ethylene produced corresponds to 86/35.1g of hexane

and 481 g correspond to 481*86/35.1=1180g of hexane

ANSWER 1180g of hexane