Blain

how do you know which names end in ide, ite, and ate?

for this question How many liters of H2 gas at STP are produced when Zn reacts with 125 mL of 6.00 M HCl? my book answers it this way: 0.125 L x 6.00 mole HCl x 1 mole H2 x 22.4 L 1 L 2 mole HCl 1 mole = 8.40 L of H2 gas where did the 22.4L come from?

The tiled floor is 5 3/4 ft by 3 1/2 ft Find the area the carpet needs to cover.