Is h2o a compound or element

C-12 has 6 protons. how many neutrons does c-13 have? select one: a. 7 b. 6 c. 13 d. 19

The atomic number of phosphorus is 15. how many electrons does it have in its 3rd shell

When assigning quantum numbers, how many of the same quantum values may two electrons in the same atom share? a.) one b.) two c.) three d.) four

Which would have a greater density, 5 g of aluminum or 5 kg of aluminum if they were both the same temperature? Fully explain your answer.

The two reactants combine to form a single product, ammonia, nh3, which is not shown. write a balanced chemical equation for the reaction.

What is a physical change? A change in matter from one form to another without becoming a new substance. A change in matter that results in a chemical reaction. A change in matter that results in the smallest unit of a compound.

You are in the room with several objects, the temperature in the room is 21 celcius, what can you assume about the temperatures of the objects in the room?

If a sample contains 74.0% of the R enantiomer and 26.0% of the S enantiomer, what is the enantiomeric excess of the mixture?

In a solution, the solvent particles are attracted to the solute particles by: a) ion/dipole forces b) dipole/dipole forces c) van der Waals forces d) any or all of these forces

Which soil layer contain the most humnas