The earliest known human ancestors are believed to have lived 3 billion years ago. True or False

What material would make the best heating element for an electric range? A. a resistor, which converts some electric energy to thermal energy B. an insulator, which stops the flow of electricity C. a conductor, which carry electric currents D.

According to kinetic molecular theory, which of the following statements are true about the behavior of gases? The particles of a gas are in constant, random motion. Gases consist of small particles that are separated from one another by empty space.

5. Identifying the limiting reagent: Given the reaction 2Cu + S → Cu2S, if you had 3 moles of both Cu and S, which would you run out of first?

Why is burning propane gas a chemical reaction? a) The atoms in propane and oxygen rearrange to form other substances after the reaction. b) The atoms that make up propane and oxygen change into different atoms after the reaction.

How many moles of glucose are present in 1.0 L of a 2.5 M solution of glucose in water?

What would you use if you needed to determine the density of an object? balance and graduated cylinder balance and scale scale and spectroscope

What are two forms of friction that oppose the motion of a moving car

How are models related to theories and hypotheses

What similarities do nuclear energy and chemical energy share?

What is the oxidation state of sulfur in SO3?