How do it geth the equation for 50.0 grams of iron(II)carbonate react completely with hydrochloric acid how many grams of carbon dioxide gas may be produced?

Answer 1

Robin, always start with the balanced equation.

FeCO3+ 2HCl>>CO2 + H2O+ FeCl2

So for each mole of iron(II) carbonate, one gets one mole of CO2.
So the issue is how many moles of FeCO3 do you have?

I assume you can take it from here.