Harper

Cân bằng PTHH sau : 10. Fe3O4 + H2SO4 ———– Fe2 + ( SO4)3 + FeSO4 + H2O 11. AL + H2SO4 ——– AL2( SO4)3 + H2 12. SO4 + AL( OH)3 ——– AL

Bởi

Cân bằng PTHH sau : 10. Fe3O4 + H2SO4 ———– Fe2 + ( SO4)3 + FeSO4 + H2O 11. AL + H2SO4 ——– AL2( SO4)3 + H2 12. SO4 + AL( OH)3 ——– AL2(SO4)3 + H2O 13. K3PO4 + CA(OH)2 ——- CA3( PO4)2 + KOH 14. H3PO4 + NaOH ——— Na3PO4 + H2O 15. H3PO4 … Đọc tiếp

1)We must pay the bill at once. -> The bill _____________________________________________________ 2)This question is difficult to understand ->It’s _

Bởi

1)We must pay the bill at once. -> The bill _____________________________________________________ 2)This question is difficult to understand ->It’s ___________________________________________________________ 3)I will repair your bicycle tomorrow afternoon. ->Your bicycle _________________________________________________ 4)“Don’t throw things away,” Miss Linda said to the students. ->Miss Linda asked _____________________________________________ 5)“We are waiting for the school bus”, said the children. ->The children … Đọc tiếp