Calculate the number of moles of HCl in 62.85 mL of 0.453 M solution of HCl.

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.