Tính số gam muối và thể tích của 7kg nước biển.Biết 100g nước biển thì có 2,5 gam muối Mong mn giúp ạ!

Thế giới có bao nhiêu ca mắc, tử vong, hồi phục do dịch.

IV Fill in the blank with suitable active and passive verb forms. ------ --- 1. This house - in 1970 by my grandfather a) Built b) Was built c) Was build d) Has built 2. The robbers by the police. a) Have arrested b) Have been arrested c) Was arrested d) Had arrested 3. We -------- for the examination. a) Have preparing b) Are preparing c) Had preparing d) Have been prepared 4. It since yesterday. a) Is raining b) Has been raining c) Have been raining d) Was raining 5. |---- for five hours. a) Have been working b) Has been working c) Was working d) Am working 6. The students to submit their reports by the end of this week. a) Have asked b) Are asked c) Has asked d) Are asking 7. She - for a while. a) Are ailing b) Is ailing c) Has been ailing d) Have been ailing 8. The teacher the student for lying. a) Has been punished b) Punished c) Is punished d) Was punished 9. ----- to become a successful writer. a) Have always wanted b) Am always wanted c) Was always wanted d) Am always wanting 11. As the patient could not walk he -- home in a wheel chairs a) Has carried b) Has been carried c) Was carried d) Was carrying

Mọi n giải thích hộ mk cách làm của phần chữ màu đỏ được k ạ .

Câu e Help tui tui đang rất cần

Làm jooj mik hep hep hep !!!!!!1😀😀

làm giúp mình với ạ mọi người ới

Dặc trưng văn học dân gian là gì?

Tại sao có khi nói Trái Đất quay quanh 1 vòng truvj hết 23h56phút có khi lại nói hết 24h

1)    Hoà tan hoàn toàn 20g hỗn hợp A gồm Mg và Fe2O3 bằng dung dịch H2SO4 loãng thấy thoát ra V(l) khí H2 (đkc) và thu được dung dịch B. Thêm từ từ dung dịch NaOH đến dư vào dung dịch B, sau khi phản ứng kết thúc, lọc lấy kết tủa đem nung trong không khí đến khối lượng không đổi thu được 28g chất rắn. Tính V(l)?