Which of the following is unique for any given element? a. the number of neutrons b. the charge on the electrons c. the number of protons d. the mass of a neutron

Why can water dissolve many ionic compounds

Which element (s) is being reduced in the redox reaction below? 6 nh4clo4 (s) + 10 al (s) 5 al2o3 (g) + 6 hcl (g) + 3 n2 (g) + 9 h2o (g) n and al h cl o?

1. What is light energy converted from in the bulb of a lamp? electric energy sound energy heat energy

2. What is the chemical name for GaC1z?

What is the mass of naoh that would have to be added to 500 ml of a solution of 0.20 m acetic acid in order to achieve a ph of 5.0?

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?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?