Is styrofoam a solid?

Balance the combustion eqation; __C5H + __O2 - - - > __CO2+__H2O

A pure substance is made up of several types of atoms true or false

Which of the following best describes isotopes? An element with the same number of neutrons, but a different number of protons. An element with the same number of protons, but a different number of electrons.

The divisions within a shell are called

What method is used to separate the oxygen from mercury oxide

Is it possible for a molecule only made up of hydrogen and carbon to be polar?

Which of these represents a chemical change?

Why do think there is often only a short amount of time to evacuate an area before an earthquake?

The force that moving, charged particles exert on one another is called? a. Contact force b. Intermolecular force c. Gravity d. Electromagnetic force

Which of the following types of electromagnetic waves has a frequency greater than ultraviolet waves? A) X rays B) infrared waves C) microwaves D) visible light