A 36-kg girl walks to the top of stairs that are 2.0-m high. How much gravitational potential energy does the girl gain

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

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.