Answers

2016-04-11T04:17:41+05:30
STP = Standard of Temperature and Pressure (0° C = 273 K, 1 atm ≈ 1013 hPa).
1 mol of gas at STP - 22.4 litre
1 l of gas weight 1.16 g
1 mol weight 22.4 * 1.16 = 26 g
It can be acetylene C₂H₂   (H-C≡C-H), which molar mass is 2 * 12 + 2 *1 = 26 g/mol
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