What is the empirical formula of a compound that is made of 3.80g of phosphorus and 0.371g of hydrogen?

You start by diving each quantity given by the atomic wight of each element:

Phosphorus (P)  

Hydrogen (H)  

Then you divide by the lowest number:

for phosphorus

for hydrogen

So the empirical formula will be:    

its pwirhfpiwe

explanation:

because dgjpwojefopjwp