H P KIM FE – ZN BTKLFE
Câu 6: H p kim Fe – Zn
BTKL
Fe : x 56x 65y 2,33 x 0, 03 HCl H2
mol
Zn : y x y 0, 04 y 0, 010,04(mol)
0, 03*56%mFe *100 72,1% %mZn 100 72,1 27,9% 2,33 áp án: BCâu 7: 6 gam h p kim Cu - Ag Cu(NO ) : xCu : x 64x 108y 6 x 0, 063 2
Ag : y HNO AgNO : y 188x 170y 14, 68 y 0, 023
BTKL:muoi
3
0, 06*64%mCu *100 64% %mAg 100 64 36% 6 T
ng đài t v
n: 1900 6933
- Trang | 12 -
áp án: B