Compound X 2 Y is known to be 60% X by mass. Calculate the percent Y by mass of the compound X 2 Y 2 .The number of moles in 12.0 g of C 2 H 6 O...

1.Compound X2Y is known to be 60% X by mass. Calculate the percent Y by mass of the compound X2Y2.

2.The number of moles in 12.0 g of C2H6O (molar mass = 46.1 g/mol) is calculated as follows

3.Which of the following has the highest mass percent of hydrogen?

A. GeH4

B. SnH4

C. CH4

D. All have same mass percent of hydrogen

E. SiH4