Khi cho kim loại tác dụng với dung dịch HCl, H2SO4 loãng có chất khí thoát ra. Chất khí đó là chất khí nào? A. khí oxi. B. khí hiđro. C. khí lưu hùynh đioxit . D. Khí clo

The boiling point of liquids is very high what does it indicate

One way that radioactive waste is treated is by burying it in repositories. the repositories are found only in states with very low populations. true or false? a. trueb. false(also i meant to put high school but it put down middle school instead)

Which of the following is the correct formula for copper (i) sulfate trihydrate? cuso4 · 3h2o cuso4(h2o)3 cu2so4(h2o)3 cu2so4 · 3h2o