Question

Use the periodic table to calculate the molar mass of each of the following compounds. Give your answer to the correct number of significant figures.
Iron(III) oxide (Fe2O3): g/mol

Answer 1

Fe: 2 x 55.845 = 111.69
O: 3 x 15.9994= 47.9982

111.69 + 47.9982 = 159.69 g/mol

Answer 2

Answer:

Magnesium hydroxide 58.33

Iron oxide 159.70

Explanation:

did it on edge