Một mẫu natri iođua thô được phân tích bằng cách mô tả sau đây. I- + SO42- → I2 + H2S (không cân bằng)

a) Xác định số oxi hóa đối với S trong SO42-.

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.