andthese ,0.7gofhydrogen,and33.6gofoxygen.Whatistheempiricalformulaofthecompound?

熱心網友

why use english? ....... -_-!calculate the moles of each elementn(N)=9.8/14=0.7moln(H)=0.7moln(O)=2.1mol 普通除法都計錯？why the answer is N7H7O8??????????????in my view it is NHO3 thus it is HNO3 硝酸 nitric acid

熱心網友

facehappywy ,good!

熱心網友

n＝m/M，n(H)=0.7/1=0.7n（N)=9.8/14=0.7n(O)=33.6/16=5.6

熱心網友

用物質的質量除以分子量得到物質的量,即the number of moles of a given substance are got by dividing the mass by the molecular weight .i.e.n＝m/M，n（N)=9.8/14=0.7n(H)=0.7/1=0.7n(O)=33.6/16=5.6thus, the empirical formula of the compound is N7H7O8,