a/
R ở nhóm VIIA nên oxit cao nhất với Oxi có dạng : R_2O_7
mRmO=7,111,2" role="presentation" style="font-family: "Open Sans", sans-serif; display: inline; line-height: normal; font-size: 14.6667px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">mRmO=7,111,2mRmO=7,111,2
<=>nhh.2.MRnhh.7.16=7,111,2" role="presentation" style="font-family: "Open Sans", sans-serif; display: inline; line-height: normal; font-size: 14.6667px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;"><=>nhh.2.MRnhh.7.16=7,111,2<=>nhh.2.MRnhh.7.16=7,111,2
=> M= 35,5 ( Clo )
b/
{Fex(mol)MgCO3y(mol)+HCl−−−−>X+Y{H2x(mol)CO2y(mol)" role="presentation" style="font-family: "Open Sans", sans-serif; display: inline; line-height: normal; font-size: 14.6667px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">{Fex(mol)MgCO3y(mol)+HCl−−−−>X+Y{H2x(mol)CO2y(mol){Fex(mol)MgCO3y(mol)+HCl−−−−>X+Y{H2x(mol)CO2y(mol)
<=>{56x+84y=36,4xy=23" role="presentation" style="font-family: "Open Sans", sans-serif; display: inline; line-height: normal; font-size: 14.6667px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;"><=>{56x+84y=36,4xy=23<=>{56x+84y=36,4xy=23
=>{x=0,2y=0,3" role="presentation" style="font-family: "Open Sans", sans-serif; display: inline; line-height: normal; font-size: 14.6667px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">=>{x=0,2y=0,3=>{x=0,2y=0,3
=> mFe = 0,2.56 = 11,2 (g) và mMgCO3 = 0,3.84 = 25,2 (g)
CMddX=0,2+0,30,8=0,625(M)" role="presentation" style="display: inline; line-height: normal; font-size: 14.6667px; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">CMddX=0,2+0,30,8=0,625(M)CMddX=0,2+0,30,8=0,625(M)
%VH_2 = 40%
%VCO_2 = 60% do ta có tỉ lệ xy=23" role="presentation" style="font-family: "Open Sans", sans-serif; display: inline; line-height: normal; font-size: 14.6667px; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">xy=23