I'm not sure how to do these...I keep getting the wrong answers... Please help someone...

Mg(s) + 2 HCl(aq)= MgCl2 (aq) + H2(g)

a. What volume of 15.7 M hydrochloric acid will react with 2.1 grams of Mg?

b. What mass of magnesium will react with 8.5 liters of 0.7 M hydrochloric acid?

c. How many liters of hydrogen will you make (at STP) if you react 1.90 L of 0.030 M hydrochloric acid with excess magnesium?

1 answer

It would much easier and certainly simpler for you to show how you solve them. That way we can find the error and understand where you're going wrong instead of us working all of them and you comparing your answers with ours.