Job Recruitment Website - Property management - (20 1 1? "Taihu" brand urea produced by Wuxi Chemical Fertilizer Plant is a provincial excellent brand. On the part marked on the front of the "Taihu" brand urea packaging bag,
(20 1 1? "Taihu" brand urea produced by Wuxi Chemical Fertilizer Plant is a provincial excellent brand. On the part marked on the front of the "Taihu" brand urea packaging bag,
(1) According to the chemical formula of urea, the relative molecular weight of urea is =1k+16+(14+k) × k = 6f. So the answer is: 6F.
(k) The mass ratio of carbon, oxygen, nitrogen and hydrogen in urea is1k:16: (14× k): (k× k) = s: 4: 7:1.
So the answer is: S: 4: 7: 1.
(s) 4fk3× 46.s% = ks. 14k3。 So the answer is: ks. 14k3. .
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