posted by pr
When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced.
CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq)
What mass of limestone must have dissolved if 1.98 1010 kg of calcium hydrogen carbonate was produced?
!. Write and balance the equation. I note there is no arrow in your equation.
2. Convert grams calcium hydrogen carbonate to moles. moles. = grams/molar mass.
3. Using the coefficients in the balanced equation, convert moles in step 2 to moles of limestone.
4. Convert mols limestone to grams. grams = moles x molar mass.
Post your work if you get stuck.