A 53.0 g sample of an unknown compound contains 13.5 g of oxygen. What is the percent by mass of oxygen in the unknown compound?

What’s the scientific notation for the number 6,840,000,000

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

If i add water to oil what will happen