The volume of ammonia gas that would be collected if 17 g of magnesium nitride is used, is 8.42 L
How to calculate the volume of ammonia gas collected?
Step 1: Calculate the mole of ammonia gas produced from the reaction. Details below:
- Mass of
(m) = 17 g - Molar mass of
(M) = 98.2 g/mol - Mole of
= m / M = 17 / 98.2 = 0.173 mole - Mole of ammonia gas,
= ?

From the balanced equation above,
1 mole of
reacted to form 2 mole of

Therefore,
0.173 mole of
will react to form = 0.173 × 2 = 0.346 mole of

Step 2: Calculate the volume of ammonia gas,
collected. This is shown below:
- Temperature (T) = 20 °C = 20 + 273 = 293 K
- Pressure (P) = 0.989 atm
- Gas constant (R) = 0.0821 atm.L/molK
- Mole of ammonia gas,
collected (n) = 0.346 mole - Volume of ammonia gas,
collected (V) =?
