1 Aplece of iron ore is found to contain a compound containing 72.3% iron and 27.7% oxygen with a molecular mass of 231.4 g/mol. What is the molecular
formula of the compound?

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2

Can anyone answer these questions? ? i need it before 1: 00pm today