calculate how many grams of the product form when 154g of Sr

calculate how many grams of the product form when 15.4g of Sr completely reacts 2Sr(s)+O2(g)=2SrO(s)

Solution

moles of Sr = 15.4/87.62 = 0.1757 moles

by the equation

2 moles of Sr gives 2 moles of SrO

0.1757 moles of Sr will give 0.1757 moles of SrO

SrO produced in grams = 0.1757 * molar mass = 0.1757*103.62 = 18.2 g