user-avatar
dddddd
2 năm trước
cho sơ đồ PUHH sau: R+O2 → RO.Biết rằng đã đốt cháy hết 2,4g kim loại R và thu đc 4g RO.Kim loại R là; A.Ca B.Cu C.Mg D.Zn
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1/ I had no maps; that's why I got lost. If I (have) ...........................a map I (be) ...........................all right. 2/ The job is much worse than I expected. If I (realise) ...........................how awful it was going to be I (not accept ) ........................... ........................... it. 3/ I'm sorry you didn't tell me that dogs were allowed in the hotel; if I (know) ........................... I (bring) ........................................my dog. He (enjoy) ........................................ the walk. 4/ It rained, which spoiled our picnic; but if it (not rain) ........................................it (be) ........................................ a great success. 5/ I didn't recognize him at first because he was wearing dark glasses; if he (not wear) ........................................ them I (recognize) ........................................him immediately. 6/ - Why didn't you phone me from the village ? - Because there was no phone in the village. If there (be) ........................................, of course we (phone) ........................................from there. 7/ We had to stand almost all the way. It was all Tom's fault. If he (book) ........................................ seats, as I told him to, we (have) ........................................quite a comfortable journey.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team