A Chemical Reaction, A(s) $\rarr$ B(s)+ C(g), Occurs When Substance a Is Strongly Heated

Multiple Choice

A chemical reaction, A(s) $\rarr$ B(s) + C(g) , occurs when substance A is strongly heated. The molecular mass of the gaseous product was to be determined from the following experimental data: Mass of A before reaction starts: 4.962 g
Mass of A after reaction finishes: 0 g Mass of residue (B) after cooling and weighing when no more gas was evolved: 3.684 g When all of the gas C evolved was collected and stored in a 658.5 mL glass vessel at 30.4 °C, the gas exerted a pressure of 748.5 torr.From this data, determine the apparent molecular mass of C, assuming it behaves as an ideal gas.

A) 6.54 g mol ^-1
B) 47.5 g mol ^-1
C) 49.1 g mol ^-1
D) 71.6 g mol ^-1
E) 141 g mol ^-1