HELP PLEASE!! How many moles of iron (III) oxide are produced when 0.275 moles of iron is reacted?

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution? a. 3.88 m, b. 1.03 m, c. 1.5 m, d. 15.5 m

What is the mass of sodium in 3 moles of sodium chloride

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.