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If hydrogen is 14% by weight in CH3(OH)x(NH3)y, then what is the possible value of x*y?(a) 6(b) 12(c) 18(d) 24 |
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Answer» The correct choice is (a) 6 To explain I would say: Let the weight of compound be 100 g, => weight of hydrogen = 14 g, => 3y + x + 3 = 14 => 3y + x = 11, => and 12 + 14 + 16x + 14y = 100, => 8x + 7y = 37, solving both equations we get x = 2 and y = 3, => x*y = 6. |
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