Question

If 16.8 g of substance XY contains 3.4 g of X, what is the mass percentage of Y?

Answer 1

79.76%

Step-by-step explanation:

16.8g of XY

3.4g of X

% of Y

mass of Y= 16.8-3.4

=13.4g

mass %= 13.4/16.8×100

mass % of Y=79.76%