19. What is the concentration of a solution that has a volume of 2.5 L and contains
660 grams of Ca,(PO.)??
a. .085 M
b. 985M
c. 089M

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?