What element produces violet light of approximately 412 nm?

a. hydrogen

b. mercury

c. sodium

d. neon

What is an example of a heterogeneous mixture? A) gasoline B) diet soda C) grape juice D) flour and water

The replacement of hydrogen from water by sodium is an example of

What would be the result of changing the number of each subatomic component on an atom?

Determine the [H+], [OH-], pH, and pOH for 0.045 M HBr

To prepare a solution of BF4 - (aq), HF (g) is bubbled into a solution containing 50.0 g of H3BO3 in a 1 L reaction vessel. Calculate the maximum number of moles of BF4 - (aq) that can be produced.

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?