What must be true about the mass of the substances involved in the reaction BEFORE the
change compared to the mass of the substances involved in the reaction AFTER
the change?

Why doesn't heat added to water make the tempature rise above 100c

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?

What is the source of continuous heat and energy that we receive from the sun