If 1 mol of XOs contains the same number of atoms as 60g of XO3, what is the molar mass of XO2?（Relative atomic masses：0 = 16.0）​

In which phase(s) do the molecules take the shape of the container?

What is the subscript for oxygen in its molecular formula

The characteristics 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 an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.