What volume of 0.100 mol dm-3 hydrochloric acid would react with 25.0g of calcium carbonate?

1) What volume of 0.100 mol dm-3 hydrochloric acid would react with 25.0g of calcium carbonate? CaCO3 + 2HCl ---> CaCl2 + CO2 + H2 Also, help would be appreciated for: 2) 13.8g of a solid monoprotic acid was dissolved in water and made up to 250cm3. 25.0cm3 portions of this were titrated against 0.250 mol... show more 1) What volume of 0.100 mol dm-3 hydrochloric acid would react with 25.0g of calcium carbonate?
CaCO3 + 2HCl ---> CaCl2 + CO2 + H2

Also, help would be appreciated for:

2) 13.8g of a solid monoprotic acid was dissolved in water and made up to 250cm3. 25.0cm3 portions of this were titrated against 0.250 mol dm-3 sodium hydroxide, requiring 23.5 cm3. Calculate the Mr of the acid.
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