When 12g graphite is burnt in sufficient oxygen CO as well as CO_(2) is formed.If the product contains 40%CO and 60%CO_(2) by mass and none of the reactant is left what is the mass of oxygen gas used in combustion? (A) 24.0g (B) 21.33g (C) 23.8g (D) 15.6g
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(C) 23.8 g is the correct answer
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