Which isotope is used to date ancient artifacts such as fossils?

carbon-12

carbon-14

uranium-238

oxygen-16

Write a balanced chemical equation for each of the following reactions: a. Phenol + sodium hydroxide b. Product of part (a) + ethyl bromide c. Product of part (a) + butyl p-toluenesulfonate d. Product of part (a) + acetic anhydride e.

Is there a qualitative difference between the enthalpy of a phase transition versus the enthalpy of a heating or cooling process? If so, explain those differences.

When a solution of NaI reacts with a solution of AgNO3, what is the net ionic equation? Na + (aq) + NO3 - (aq) → NaNO3 (s) Na (aq) + NO3 (aq) → NaNO3 (s) No reaction Ag + (aq) + Cl - (aq) → AgCl (s)

The compound NaCl is an example of a (n) A. covalent compound B. ionic compound C. element D. molecule

Calculate the average atomic mass for neon if its abundance in nature is 90.5% neon-20, 0.3% neon-21, and 9.2% neon-22

Which is more dense a pound of rice or a pond of cement

An essay that is 530 words over an experiment. EX. Coke vs Mento Invisible Ink

K2so4 is a strong electrolyte. determine the concentration of each of the individual ions in a 0.600 m k2so4 solution.

How many grams of the excess reactant remain assuming the reaction goes to completion and that you start with 15.5g of na2s and 12.1g cuso4?

Which elements can be found in the sun? a. hydrogen and oxygen b. helium and oxygen c. hydrogen and helium d. hydrogen and nitrogen?