user-avatar
nguyentinquanghuy0
2 năm trước
Câu 4. (1đ)Trong phân tử một hợp chất được tạo bởi 2 nguyên tử nguyên tố R và 5 nguyên tử nguyên tổ oxi. Tìm nguyên tử khối và tên nguyên tố R. Biết hơp chất này nặng hơn phân tử hidro 71 lần. Mng giup em bai nay voi a, em cam on
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

5 câu đầu tiên đã đc lm mẫu…Các bn chỉ cần lm 3 câu tiếp theo giúp mk nhé! Thanks nhiều ạ Rewrite the following sentences 1.We started living here fifteen years ago. -We have + P2 + TG We have lived here for fifteen years. 2.His briefcase is red. My briefcase is red, too. -The color of the same ...as The color of your briefcase is the same as mine. The color of your briefcase and mine are the same. 3.It isn’t necessary for you to set off early. -You don’t …need. + to V/ have to + V…………………….. You don’t need to set off early. You don’t have to set off early. 4.He failed the exam because of his laziness. -Because he was lazy, he failed tthe exam. 5. These houses were built many years ago. -They + Vqk...................... They built these houses many years ago. 6.Walking in the rain gives my brother pleasure.-My brother enjoys………………………… 7.Have you ever played a computer game before?-Is this…………………………………… 8.Having a vacation abroad is very interesting.-It is …………………………………… 9.Would you mind if I smoked in here?-Do you mind…………………………

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