If the matter changes identity rather than just form, then a (4). has occurred.

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

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

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.