A controlled experiment is the only type research that can show

a. motivation

b. consent

c. change

d. cause and effect

Convert this to metric units 0.000238 m to cm

If the original sample of Zn had a mass of 1.4 g, what mass of ZnCl2 can be produced in the reaction?

NaHCO₃ is a. a strong acid b. a strong base c. a weak acid d. a weak base e. a salt (made from an acid and a base)

If some of the bromine/methylene chloride mixture spills on you, what actions should you take? (choose all that apply) a. Remove your gloves and/or lab coat if any spilled b. Wash any affected skin with plenty of water c.

Gallium has a weighted average atomic mass of 69.7 and two naturally occurring isotopes: gallium-69 and gallium-71. Gallium-69 has a relative abundance of 60.1% and a mass of 68.9. The relative abundance of gallium-71 is 39.9%.

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