Take a 100 g sample which will give you
3.99 g P
82.3 g Br and 13.7 g Cl
Convert g to moles. moles = grams/atomic mass.
Now find the ratio of each element to the others using whole numbers. The easy way to do this is to divide the smallest number by itself (thus you get 1.0000 for that element), then divide the others numbers by the same small number. Round everything to a whole number and that should be the empirical formula.
A compound contains 3.99% P, 82.3% Br, and 13.7% Cl. Find the empirical formula
1 answer
1 answer