Cho 10 gam hỗn hợp gồm Fe và Cu tác dung với dung dịch H2SO4 loãng (dư).Sau khi phản ứng thu d 2,24 lít khí hidro (ở dktc), dung dịch X và m gam chất rắn không tan. Giá trị của m là (Cho H =1,Fe=56, Cu=64)

In this reaction n2o4(g)→2no2(g) what changes in color would you expect as pressure is increased at a constant temperature

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table