How many moles of sodium metal are needed to make 3.6 moles of sodium chloride?

given the reaction: 2na + cl 2 → 2nacl

a. 3.6
b. 7.2
c. 1.8
d. 0.9
e. not enough information

Option A.

Explanation:

This is the reaction:

2Na + Cl₂ → 2NaCl

By stoichiometry, ratio is 2:2. So 2 mol of NaCl are produced by 2 moles of Na.

So the answer is 3.6 moles

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8