Find the number of moles in 3.7 x 10^-5 g of magnesium phosphate. please explain correctly.

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.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166

How many grams are in 68.2 molecules of br2?