-Na2O + H2O 2 NaOH đúng

-Zn+O2Zn O2 (sai vì Zn hóa trị 2, 2Zn+O2->2ZnO)

-2Al+3Cl22AlCl3 đúng

-P+2O2PO4 (sai vì 4P+5O2→ 2P2O5)

-CaCO3CaO+CO2 (thiếu nhiệt độ)

45% của 100 là:

100*45/100=45

đáp số:45

tìm lỗi sai và sửa lại :

1.The sun is shining brightly when I got up this morning

2.While pam was getting out of the taxi , she slipped and break her leg

3.When I came home from work yesterday evening ,I was taking a bath

4.I saw your father this morning .He is exercising in the park then

5.People aren't liking Marge because she is always complaining about anything

giải thích hộ mik với