What indicates that a chemical reaction has taken place explain why the indicator would be a sign of chemical reaction is not a sign of physical change

1. calculate the approximate enthalpy of the reaction in joules. estimate that 1.0 ml of vinegar has the same thermal mass as 1.0 ml of water. iqnore the thermal mass of th sodium bicarbonate. note: it takes about 4.2 joules () to change 1.0 gram (1.0ml) of water 1.0 c

Athe top of a hill, an athlete on a skateboard has x joules of mechanical energy. how much mechanical energy will she have at the bottom of the hill? ignore the effects of friction.

Will a solution form when the solvent and solute are both nonpolar? a. not likely b. never c. most likely