hello i wanna ask Q34 , sulphur molecule is S8 while Oxygen molecule is O2 why one mole of sulphur and one mole of oxygen contain the same number of atoms ?
Thanks for your question2g of S8= 2/(32x8)0.007815 mol0.007815 mol of S8 contain = 0.007815 x 8 =0.0625 mol of S atom1 g of O2 = 1/(16x2) =0.03125 mol 0.03125 mol of O2 contain = 0.03125 x 2 = 0.0625 mol of O atomSo, they both contain 0.0625 mol of atom and (2) is correct.
想問下有冇Cut-Off ?
有呀，呢個係我們一班導師定出來的cutoff 線5** 92%5* 85%5 75%4 65%3 55%
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then give me your email =-]
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hello i wanna ask Q34 , sulphur molecule is S8 while Oxygen molecule is O2
ReplyDeletewhy one mole of sulphur and one mole of oxygen contain the same number of atoms ?
Thanks for your question
Delete2g of S8= 2/(32x8)0.007815 mol
0.007815 mol of S8 contain = 0.007815 x 8 =0.0625 mol of S atom
1 g of O2 = 1/(16x2) =0.03125 mol
0.03125 mol of O2 contain = 0.03125 x 2 = 0.0625 mol of O atom
So, they both contain 0.0625 mol of atom and (2) is correct.
想問下有冇Cut-Off ?
ReplyDelete有呀，呢個係我們一班導師定出來的cutoff 線
Delete5** 92%
5* 85%
5 75%
4 65%
3 55%
i dont hae facebookcan you tellme the password?
ReplyDeletethen give me your email =-]
ReplyDelete