First slide

Stoichiometry and Stoichiometric Calculations

Question

At 298 K, 20 ml of methane is subjected to combustion with 50 ml of oxygen. The volume of gases left after the reaction will be

Easy

A

10 ml
B

20 ml
C

40 ml
D

30 ml

Solution

${CH}_{4} (g) + 2 O_{2} (g) \to {CO}_{2} (g) + 2 H_{2} O (l); 20 ml 40 ml 20 ml Volume of oxygen remained unused = 10 ml; Volume of carbon dioxide formed = 20 ml; Total volume of gases after the reaction = 30 ml$

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