Gas that can be poured from one vessel to another. ammonia propane. methane. acitalene

In order to “pour” gas from vessel to vessel, it must be heavier than air or its relative molecular weight must be greater than the molecular weight of air (Mr (air) = 29).

Let’s calculate the relative molecular weights of the gases presented:

1. Mr (NH3) = 14 + 3 = 17, 17 <29;

2. Mr (C3H8) = 3 * 12 + 8 = 44, 44 ˃ 29;

3. Mr (CH4) = 12 + 4 = 16, 16 <29;

4. Mr (C2H2) = 2 * 12 + 2 = 26, 26 <29.

Answer: propane C3H8.