A piece of Iron ore is found to contain a compound containing 72.3% iron and 27.7% oxygen with a molecule mass of 231.4 g/mol. What is the molecular of the compound?

State the formula for density in words and mathematical symbols

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.

May someone me with these science questions