Calculate the following questions with all the steps included;;
Q1.
How many grams of CuO can be made from a piece of copper wire weighing 0.2134 g?
Q2.
2.04 g of carbon reacts with 5.44g of oxygen to form 7.48g of compound.How many atoms of O per atom of C are in this compound?
Q3.
What is the molecular formula of a compound that is 5.93% H and 94.07% O,with molar mass 34.015g?
Q4.
How many kg of Oxygen(g) can be produced from 1.0kg of hydrogen peroxide?
tHANks
CHEM QUESIONS..急!!
2007-02-26 12:28 am
回答 (1)
2007-02-26 3:23 am
✔ 最佳答案
1.0.2134g/63.5=mole of copper=3.36*10^-3mole
3.36*10^-3*(63.5+16)=gram of copper oxide=0.267g
===
2.
mole of carbon=
2.04/12=0.17mole
mole of oxygen
5.44/16=0.34mole
=.=....5.04+2.04=7.48......
compelete react...
C:O=1:2
===
3.
mole of H=34*5.93%/1=2
mole of O=34*94.07%/16=2
molecular formula=H2O2
===
4.
1000/(16*2+1*2)=29.4mole
so we need 29.4mole oxygen to produce H2O2
29.4*32/1000=0.941Kg
參考: 你都做到呀......下次試下自己做先
收錄日期: 2021-05-03 12:13:01
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070225000051KK03460