英语化学求分子式和试验试！！！

来源：百度知道 编辑：UC知道 时间：2024/05/21 01:47:00
A compound contains only carbon, hydrogen, and oxygen. Combustion of 10.68 mg of the compound yields 16.01 mg CO2 and 4.37 mg H2O. The molar mass of the compound is 176.1 g/mol. What are the empirical and molecular formulas of the compound? (Type your answer using the format CO2 for CO2.)
empirical formula
________________
molecular formula
________________

m(C)=(16.01/44)*12=4.36636 (mg)
m(H)=(4.37/18)*2*1=0.48556 (mg)
m(O)=10.68-4.36636-0.48556=5.82808 (mg)

n(C);n(H);n(O)=(4.36636/12):(0.48556/1):(5.82808/16)=3;4;3

empirical formulas of the compound;
C3H4O3

M(C3H4O3)n=176.1,
so n=176.1/(12*3+4*1+18*3)=2

molecular formulas of the compound;
C6H8O6

empirical formula C3H4O3

molecular formula C6H8O6 (Vitamin C)

鉴于这个应该是比较初级的化学 上面的答案是对的 权作参考
其实具体分子式可以式很多种 比如

丙酮酸 C3H4O3 等等 很多种答案都是对的