Answer:
C. 14
Explanation:
The mass number is the number of protons + neutrons and the atomic number is the number of protons.
If the mass number is 27, you subtract the atomic number, 13.
27 - 13 = 14 neutrons
0.0859
idk maybe chlorine 12
The answer is:
the molarity = 50 moles/liters
The explanation:
when the molarity is = the number of moles / volume per liters.
and when the number of moles =2.5 moles
and the volume per liters = 0.05 L
so by substitution:
the molarity = 2.5moles/0.05L
= 50 moles /L
