First slide

Stoichiometry and Stoichiometric Calculations

Question

At 298 K, 10 ml of methane is subjected to combustion with 40 ml of oxygen. The volume of gases left after the reaction will be

Moderate

A

10 ml
B

20 ml
C

15 ml
D

30 ml

Solution

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

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