How many moles of iron are there in each of the following?

a.) 2.50 moles of feo
b.) 8.3 moles of fezo3
c.) 0.45 moles of fe(oh)3
d.) 2.7 moles of fe3o4

Which type of substance ionizes partially and gives off hydrogen ions when dissolved in water? a. strong acid b. strong base c. weak acid d. weak base

Why do lunar and solar eclipse not happen every month

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.