Bố mua về 60kg phân urê, để bón rau. Hỏi rau đã hấp thụ được bn: a. mN; b. số nguyên tử H; c. số phân tử Urê.

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Đáp án:

Giải thích các bước giải:

Ure: (NH2)2CO

a, 60g ure có 28g N

60kg ure có 60.28:60=28kg N

b. n(ure)= 60.10^3:60=1000mol

nH = 4 n(ure) = 4 x 1000 = 4000mol

1mol H có 6.10^23 nguyên tử H

→ 4000mol H có 4000.6.10^23=2,4.10^27mol H

c. 1 mol ure có 6.10^23 phân tử ure

→ 1000mol ure có 1000.6.10^23 = 6.10^26 mol phân tử ure

#andy

KHHH của Ure: `(NH2)2CO`

`a, 60g ure` có `28g N`

`60kg` ure có `60.28:60=28kg N`

`b. n(ure)= 60.10^3:60=1000mol`

`nH = 4 n(ure) = 4 x 1000 = 4000mol`

`1mol H có 6.10^23` nguyên tử `H`

`=> 4000mol H có 4000.6.10^23=2,4.10^27mol H`

`c. 1 mol` ure có `6.10^23` phân tử `ure`

`=> 1000mol` ure có `1000.6.10^23 = 6.10^26` mol phân tử `ure`

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