306 grams of an unknown is composed of two substances in unknown quantities: Mg

Question

306 grams of an unknown is composed of two substances in unknown quantities: Mg sO4 x 7D2O and CaCo3. Use 153 grams in this reaction: MgSo4 x 7D2O yields MgSo4 x 4D2O plus 3D2O. The crucible mass is 100 grams and crucible mass plus product after heating is 233 grams. The other reaction is CaCO3 plus 2HCl yields CaCl2 plus CO2 plus H2O. 17.1L of CO2 produced and baro pressure is 760 torr. the temp is 300K. What percent of unknown is Magnesium Sulfate heptadeuterate by mass and by moles? What percent of unknown is Calcium Carbonate by mass and by moles? How many moles of each do you have? Does the unknown have any impurities?

Explanation / Answer

306 grams of an unknown is composed of two substances in unknown quantities: Mg

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