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need help with some chemistry questions.

i don't understand what these questions want me to do please explain.

10g of calcium carbonate is reacted with excess hyrdochloric acid. (hcl) calculate the volume of c02 formed at room temperature

1.2g of magnesium reacts with excess sulfuric acid calculate the volume of hydrogen produced. at room temperature and pressure.

thanks please explain as clearly as you can.

Reply 1

Munrot07

Original post by liamb89

For both questions right out the equation showing what is happen so CaCO3 + HCl ---> (and you right the products). You will then see that CaCO3 + HCl produces CO2, the question is asking how much CO2 is produced when 10g of CaCO3 reacts with HCl (so work out moles of CaCO3, look at molar ratio, work out moles of CO2 and then work out the volume).

Same method for the second question