What phase change is endothermic

This type of heat transfers requires direct contact to move energy

If some of the bromine/methylene chloride mixture spills on you, what actions should you take? (choose all that apply) a. Remove your gloves and/or lab coat if any spilled b. Wash any affected skin with plenty of water c.

Describe what evidence might tell you that a chemical reaction has occurred.

Which are applications of electrolysis? Check all that apply. the splitting of pure water into hydrogen and oxygen the discharging of a battery to do work the joining of aluminum and oxygen to become ore the creation of a surface resistant to

In the analysis step of the scientific method, what is analyzed

What type of reaction is sodium reacting with chlorine

1. If temperature is increased, the number of collisions per second

1. Tonic Bonds are a. Formed when a metal and nonmetal transfer electrons b. Formed when a nonmetal and nonmetal share electrons Formed when a metal forms || bonds with other like atoms d. Formed when noble gases lose electrons

Why does the sun appear to be the brightest star in the sky? A - Its apparent brightness is much greater than other stars. B - It burns more gas, making it brighter than any other star.

What effect does nuclear radiation have on atoms? It splits atoms. It burns atoms. It ionizes atoms.