Đáp án:
`B`
Giải thích các bước giải:
`4P+5O_2 ->2P_2 O_5`
Đáp án: câu B
PTHH: 4P + 5O2-->2P2O5
Choose the best answer.
We are looking for ____ place to spend ____ night.
Please turn off ___ lights when you leave ___ room.
I like _____ colorful costumes of ____ ethnic minority people in Vietnam.