How many moles are in 124.0 grams of sodium hydroxide, NaOH (Molar Mass of 40.0 g/mol) a. 4960. moles
c. 3.100 moles
b. 0.3226 moles
d. 22.99 moles

Can someone me with questions 15 to 17 plz.

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?

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.