# chemistry

posted by
**Mary**
.

A 13.5 g sample of X reacts with a sample of Y to form 81.1 g of XY. What is the mass of Y that reacted?

posted by
**Mary**
.

A 13.5 g sample of X reacts with a sample of Y to form 81.1 g of XY. What is the mass of Y that reacted?