posted by Mary .
A mixture contained CaCO3 and MgCo3. A sample of this mixture weighing 7.85g was reacted with excess HCl. The reactions are--
CaCO3 + 2HCl --> CaCl2 + H2O + CO2
MgCO3 + 2HCl --> MgCl2 + H2O + CO2
Is the sample reacted completely and produced 1.94L of CO2, at 25 degrees C, 785mmhg, whre were the percentages of CaCO3 and MgCO3 in the mixture?
So far, I got the moles of CO2 by using PV=nRT, which is .0817moles of CO2,
I don't kno what to do next.. can anyone PLEASE help!
NEED HELP will NOT get you help. Name it Chemistry or whatever it is.