trong sgk ai bt mà làm

nCl2=1,5.10236.1023=0,25(mol)mCl2=n.M=0,25.71=17,75(g)VCl2(đkc)=n.22,4=0,25.22,4=5,6(l)

423×18+423×16−423:9=423×18+423×16−423×19=423×(18+16−19)=423×3509=14335

trees

x=2

123

lỗi :v

tục ngữ đâu mà chia 

Stay at home, you can't go anywhere :))

a) $n_{O_2}=\frac{m}{M}=\frac{4.8}{32}=0,15\left(mol\right)$

b) $0,{\mathrm{15.6.10}}^{23}=0,{9.10}^{23}$