a 0.7549 g sample of a compoun burns in O2 to produce 1.9061g of CO2 and 0.3370g H20
问题描述：
a 0.7549 g sample of a compoun burns in O2 to produce 1.9061g of CO2 and 0.3370g H20
1.calculate the individual masses of ,c,h,and o in the 0.7549 sample
2.determine the empirical formula of the compound.
答
题目大致意思：0.7549 g的化合物试样在氧气中燃烧,生成1.9061 g的co2和0.3370g的H2O,要求：计算0.7549 g试样中C、H、O三种元素的质量；确定化合物的分子式
（1）C的质量=1.9061*12/44=0.5198
H的质量=0.3370*2/18=0.0374
O的质量=0.7549-0.5198-0.0374=0.1977
（2）C、H、O的物质的量的比=（0.5198/12）:(0.0374):(0.1977/16)=7:6:2
根据这个比值来看,应该是苯甲酸了