which mass of urea CO(NH2)2 contain the same mass of nitrogen as 101.1g of potassium nitrate?

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03-06-2017
Chemistry

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which mass of urea CO(NH2)2 contain the same mass of nitrogen as 101.1g of potassium nitrate?

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dec77cat dec77cat · Answer 1 · 2017-06-03T18:05:54+02:00

dec77cat dec77cat

03-06-2017

M(KNO₃)=101.1 g/mol
M(CO(NH₂)₂)=60.1 g/mol

m(N)=M(N)m(KNO₃)/M(KNO₃)

m(N)=2M(N)m(CO(NH₂)₂)/M(CO(NH₂)₂)

2m(CO(NH₂)₂)/M(CO(NH₂)₂)=m(KNO₃)/M(KNO₃)

m(CO(NH₂)₂)=M(CO(NH₂)₂)m(KNO₃)/(2M(KNO₃))

m(CO(NH₂)₂)=60.1*101.1/(2*101.1)=30.05 g

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