What starts chemical changes in foods?

Where do people and other animals get energy to move around

Earthquakes can ___ A. Trigger other earthquakes B. Cause tsunamis C. Cause billions of dollars in damages D. All of the above

Conservation of Mass means: A. Mass is gained in a chemical change B. Mass is lost in a chemical change C. Total mass of the chemicals doesn't change in a chemical change D. Change in total mass depends on the type of chemical change

A gas that has a volume of 28.0 liters, a temperature of 45.0 °C, and an unknown pressure has its volume increased to 34.0 liters and its temperature decreased to 35.0 °C. If I measure the pressure after the change to be 2.

Does the addition of water (baking soda+water) alter the ph of weak acids/bases? how does it change the ph of strong acids/bases? why or why not

Describe when an ionic compound can conduct electricity

A element which is not a monatomic A. Helium B. Argon C. Iron D. Oxygen

How can you use the Periodic Table to determine whether an element is a metal, nonmetal, or metalloid?

A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 4.2 cm. Its mass is 1.1 kg. Calculate the density of the metal.

Why is the formula CCL4 a nonvolatile molecule with polar covalent bonds?