goi so mol tung chat la x y z ta co74.5x+95y+58.5z=6.665
tinh dk Mg khi them vao la 0.15
cho hcl vao tinh duoc mg du la 0.05
tim mg phan ung la 0.1
Mg +2AgNO3>>> 2Ag + Mg(NO3)2
0.1 0.2
tim AgCl la 0.13
bao toan nto x + 2y +z=0.13
va y=0.05 ( chat ran la MgO lay so mol MgO - so mol Mg phan ung vs dd AgNO3 )
giai x=0.01
y=0.05
z=0.02