(chem)calculate the mass
2007-03-05 3:30 am
When copper(2)nitrate is heated, it gives nitrogen dioxide,oxygen gas and copper(2)oxide.Find the mass of the nitrogen dioxide formed when 4g copper(2)nitrate is heated.
回答 (1)
2007-03-05 4:14 am
✔ 最佳答案
2Cu(NO3)2 > 4NO2 + O2+ 2CuOAs all the nitrogen in NO2 comes from the copper(II) nitrate,
No. of mole of Cu(NO3)2
=4/(63.5+14*2+16*3*2)=0.0213 mol
Mole ratio of Cu(NO3)2 : NO2
=2:4=1:2
Therefore, the no. of mole of NO2
=0.0213*2=0.0416 mol
Mass of NO2
=0.0416*(14+16*2)=1.9136 g
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