1. Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the reaction
NH4NO3(s) −→ N2O(g) + 2 H2O(ℓ).
How much NH4NO3 is required to produce
29.7 g of N2O?

2. Carborundum (SiC) is a hard substance made
by combining silicon dioxide with carbon (C)
as follows:
SiO2(s) + 3 C(s) −→ SiC(s) + 2 CO(g).
What mass of SiC is formed from the complete reaction of 1.43 mol of carbon?
Answer in units of g