do you think the mass of the products after the chemical reaction would be greater than, less than, or the same as the mass of the reactants before the chemical reaction?

If an area has high air pressure and low humidity, what type of weather will it most likely have? plz !

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.

37.0 °c = °f (human body normal temperature)