Which one of the following is a pure substance? 1. milk2. Concrete3. Wood 4. Salt water5. Elemental copper

When the limiting reactant in a chemical reaction is completely used, what happens to the reaction? The reaction stops. The reaction speeds up. The excess reactants begin combining. The reaction slows down.

Write down two other examples of nonrenewable resources.

Why is water classified as a renewable resource? A). Water is constantly being recycled through earth's system. B.) Groundwater that is rarely used makes up 80% of the earth's water. C).

What keeps an electron in motion around the nucleus to which it is attracted?

What is the neutral particle that is formed when atoms share electrons? cation cation ionic compound molecule nucleus

What is a converging lens

What type of reaction is 2 NO2 - --> 2 O2 + N2

The main source of phosphorous is in: rocks water plants the atmosphe

To what part of a plant does the stem sliver water and nutrients

You place a balloon in a closed chamber at STP. When the balloon doubles in size, what happens to the chamber pressure? A.) The pressure stays the same B.) The pressure doubles C.) The pressure reduced by one half