... gam X thỡ thu c hp kim mi ú Li chim 13,29% lng Kim loi R hp kim X l A Ca B Ba C Sr D Mg Cõu 12: Nung núng 27,3 gam hn hp NaNO3 v Cu(NO3)2 ... 13: hũa tan ht a mol kim loi M cn 1,25a mol H2SO4 sinh khớ X (sn phõm kh nht) Hũa tan ht 19,2 gam kim loi M vo dung dch H 2SO4 to 4,48 lit khớ X (ktc) l sn phõm kh nht Kim loi M l A Fe B Cu ... 19,4 gam kim loi Dung dch X tỏc dng vi dung dch NaOH d thu c a gam kt ta Giỏ tr ca a l A 13,95 B 15,45 C 17,15 D 17,35 Cõu 16: Hp th hon ton 4,48 lớt CO (ktc) vo 200 ml dung dch cha ng thi Na 2CO3...