How much heat in calories is released when 25.0 g of water is cooled from 85.0 degrees c to 40.0 degrees c?
a: -4710 cal
b: -4.71 cal
c: -1125 cal
d: -1.125 cal

What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients

A1.50-liter sample of dry air in a cylinder exerts a pressure of 3.00 atmospheres at a temperature of 25°c. without changing the temperature, a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.00 atmospheres. the volume of the gas is

Astable atom that has a large nucleus most likely contains 1. more neutrons than protons. 2.more protons than neutrons. 3.equal numbers of protons and neutrons. 4.changing numbers of protons and neutrons.