Please help me solve the following question :
What mass of metal is present in 10 moles of K2Cr2O7?
Thanks!
Chemistry - Easy Mole Calculation
2008-08-13 9:59 pm
回答 (2)
2008-08-14 12:12 am
✔ 最佳答案
In K2Cr2O7, K and Cr are metals, while O is non-metals.
In 10 mol of K2Cr2O7:
No. of moles of K = 10 x 2 = 20 mol
No. of moles of Cr = 10 x 2 = 20 mol
Molar mass of K = 39.0 g mol-1
Molar mass of Cr = 52.0 g mol-1
In 10 mol of K2Cr2O7, mass of metal
= Mass of K + Mass of Cr
= 20x39 + 20x52
= 1820 g
=
2008-08-13 10:13 pm
the mass of metal = 10*(2*39+2*52+7*16)
=2940g
=2940g
收錄日期: 2021-04-23 23:05:39
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