A mass of 50g of calcium carbonate is heated, releasing carbon dioxide and calcium oxide. Which of these recorded masses of products is possible, according to the Law of Conservation of Mass?

A. 23g of carbon dioxide, 50g of calcium oxide
B. 29g of calcium oxide, 21g of carbon dioxide
C. 50g of calcium oxide, 50g of carbon dioxide
D. 50g of calcium oxide, 1g of recorded carbon dioxide

Determine the number of moles of air present in 1.35 l at 750 torr and 17.0°c. which equation should you use? n=pv/rt what is the number of moles present? ⇒ 0.056 mol a sample of n2 gas occupying 800.0 ml at 20.0°c is chilled on ice to 0.00°c. if the pressure also drops from 1.50 atm to 1.20 atm, what is the final volume of the gas? which equation should you use? v2= p1v1t2/p2t1 what is the final volume of the gas? ⇒ 932 ml these are the answers