Which of the following atoms has the same number of neutrons as 19F?

a. 16O

b. 18F

c. 20Ne

d. 23Na

If an atom contains 11 protons and 12 neutrons, what is its atomic number?

Convert 45 joules to heat calories

You have two separate containers each filled with a gas. The containers have the same volume and are at the same temperature. The gases also exert the same pressure. Which of the following statements are true? a.

When atmospheric carbon dioxide reacts with water in the atmosphere, it forms carbonic acid. This acid can then react with some forms of rock, weakening it and changing its chemical composition. What is this known as?

How do you prove law of conservation of mass?

Is this base a physical or chemical property?

Classify each of the following aqueous solutions as a nonelectrolyte, weak electrolyte, or strong electrolyte. a) LiClO4 b) HClO c) CH3CH2CH2OH d) HClO3 e) CuSO4 f) C12H22O11

Give examples of temporaty physical change

Which of these is a source of sediment? A. Fragments of other rocks B. Chemicals and Minerals dissolve in water C. Sea shells D. All of the above

Which resonance forms of silicon dioxide contribute the most to the actual bonding?