Calculate the percentage by mass of lead in pbco3.

a. 17.96

b. 22.46

c. 73.05

d. 77.54

e. 89.22

Describe what you observe when you light a Bunsen burner.

4. Among the following elements, which one has the most ionization energy? A) Cl B) Ba C) Si D) Br

23g of Na? 12g of Mg?

You may recall that the products of the complete combustion of a hydrocarbon are water vapor and carbon dioxide gas. Write the balanced equation showing the combustion of methane.

Which is considered a cation? A. H + B. Cl - C. Ne D. He

How does an atom with too few neutrons relative to protons undergo radioactive decay? * by converting proton to a neutron by converting a neutron to a proton by emitting an alpha particle

What is the chemical formula for the compound formed between sodium and iodine?

8. Write a balanced chemical equation showing how you could prepare each of the following salts from an acid-base reaction: KNO3, NaBr, and Cas.

Is calcium carbonate a compound element or mixture?

Why do covalent bonds not involve the transfer of electrons