NEED HELP PLZZ

Question

)A compound of Bromine & Rubidium contains 65.94g of metal and 62.06g of nonmetal. How
many grams of rubidium are in 36.77g of compound? How many grams of Bromine?

Answer 1

Percent Composition:

 

Total mass = 65.94 g + 62.06 g = 128.0 g

% Rubidium = 65.94 g/128 g (x100%) = 51.5%

% Bromine = 100 - 51.5 = 48.5%

 

Grams rubidium in 36.77 g of compound = 36.77 g x 0.515 = 18.94 g rubidium

Grams bromine in 36.77 g of compound = 36.77 g x 0.485 = 17.83 g bromine