How many grams are contained in 19.7 moles of Copper (III) Hydroxide?

Iwill give extra points to who gets this right

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

All cells are made of four types of acids, lipids, proteins, and carbohydrates.