Combustion of a 0.9835-g sample of a compound containing only carbon,hydrogen,and oxygen produced 1.900 g of CO2 and 1.0
问题描述：
Combustion of a 0.9835-g sample of a compound containing only carbon,hydrogen,and oxygen produced 1.900 g of CO2 and 1.070 g of H2O.
a.What isthe empirical formula of the compound?
答
化合物中含有C的质量：1.900*(12/44)=0.5182g
化合物中含有H的质量：1.070*(2/18)=0.1189g
化合物中含有O的质量：0.9835-0.5182-0.1189=0.3464g
则：分子式中系数之比：
0.5182/12 ：0.1189/1 ：0.3464/16
=0.04318 :0.1189 :0.02165
=4：11：2
所以,经验化学式为：C4H11O2或者[C4H11O2]n