4fe+3o2--> 2fe2o3. how many moles of fe2o3 are produced from 0.5 moles of o2? a. 0.33 mol b. 0.75 mol c. 0.38 mol d. 0.67 mol

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

What is the mass of 0.46 mol of mgcl2