A) An aqueous solution of ammonium nitrite,
NH₄NO₂, decomposes when heated to give off
nitrogen, N₂

NH₄NO_2(s) → 2H₂O(g) +
N₂(g)

This reaction may be used to prepare pure nitrogen. How many
grams of ammonium nitrite must have reacted if 3.75 dm³
of nitrogen has was collected over water at 26^oC and
97.8 kPa? [1] g

B)A 2.50-L flask was used to collect a 5.65-g sample of propane
gas, C₃H_{8. After the sample was collected, the
pressure was found to be 741 mmHg. What was the temperature of the
propane in the flask? [1] ^oC}