Use the law of conservation of mass to answer the questions.

1. Consider a hypothetical reaction in which A and B are reactants and C and D are products. If 21g of A completely reacts with 23g of B to produce 17 g of C, how many grams of D will be produced?

2. A 3.3 g sample of sodium hydrogen carbonate is added to a solution of acetic acid weighing 10.1 g. The two substances react, releasing carbon dioxide gas to the atmosphere. After the reaction, the contents of the reaction vessel weigh 11.6 g. What is the mass of carbon dioxide released during the reaction? n