1.

A fertilizer contains20% nitrogen by mass. To proivided a fruit tree with an equivalent of 1 kg of nitrogen, the quantity of fertilizer required is

Answer»

20 kg
0.20 kg
0.05 kg
5 kg

Solution :Mass % = `("(mass of nitrogen )")/("(mass of FERTILISER)")XX100`
`RARR =(1 kg)/x xx100 rArr x=100/20=5 kg `


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