If PVA has a relative molecular mass of 91800, what is the no. of monomers required for the formation of one PVA molecule? (molecular formula of monomer of PVA: C4H6O2)
除唔盡, 咁答案應該係咩？
Chem(calculate no. of monomer)
2012-12-09 4:23 am
回答 (1)
2012-12-09 7:25 am
✔ 最佳答案
The formula mass of a monomers of PVA= 12x4 + 1x6 + 16x2
= 86
The number of monomers required
= 91800 / 86
= 1067
2012-12-08 23:29:16 補充：
The relative molecular mass is an approximation. Hence, take an approximaton for the answer. Since the relative molecular mass is to 3 sigificant figures, you had better take 3 significant figures for the answer, i.e. 1070.
參考: andrew, andrew
收錄日期: 2021-04-13 19:10:12
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