C = 4 mol/l
v = 0.5 l
n(NaCl)=cv
n(NaCl) = 4 mol/l · 0.5 l = 2 mol
2 moles of NaCl must be dissolved
D is the correct answer......
hope it help, please thank me if it did.....
They all look like there decaying and was left out or sat inside too long
Answer:
1.91×1021/6.023×10^23
Explanation:
need thanks and make me brainiest if it helps you
