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Question
A fertilizer contains 20% nitrogen by mass. To provide a fruit tree with an equivalent of 1 kg of nitrogen, the quantity of fertilizer required is ______.
A fertilizer contains 20% nitrogen by mass. To provide a fruit tree with an equivalent of 1 kg of nitrogen, the quantity of fertilizer required is ______.
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Solution
The correct option is C 5 kg
It is given that the given fertilizer contains 20% nitrogen by mass. The mass of nitrogen is 1 kg. By formula, mass percent = (mass of nitrogen/mass of fertilizer)*100 Hence, 20 = (1 /x)*100.Therefore, x = 100/20 = 5 kg.Hence, 5 kg of fertilizer is required to provide a fruit tree with an equivalent of 1 kg of nitrogen. Thus, the correct answer is '5 kg.'
It is given that the given fertilizer contains 20% nitrogen by mass. The mass of nitrogen is 1 kg.
By formula, mass percent = (mass of nitrogen/mass of fertilizer)*100
Hence, 20 = (1 /x)*100.
Therefore, x = 100/20 = 5 kg.
Hence, 5 kg of fertilizer is required to provide a fruit tree with an equivalent of 1 kg of nitrogen.
Thus, the correct answer is '5 kg.'
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