1.

78 grams of benzene is burnt in air, how much water will it produce?(a) 18 grams(b) 36 grams(c) 54 grams(d) 72 grams

Answer» Right choice is (c) 54 grams

To explain I would say: The balanced chemical reaction is C6H6 + 7.5O2 -> 6CO2 + 3H2O, => moles of water = 3*78/78 = 3, => weight of water produced = 3*18 = 54 grams.


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