Assume that you measured exactly 2.0 mL of the sodium chloride solution into a small test tube. How many moles of sodium chloride are in the tube?

0.034 mol (4dp)

Explanation:

Use the formula n = m/M where n= number of moles, m=mass in grams and M=molar mass in g/mol.

Therefore to find how many moles, divide the mass in grams (2) by the molar mass of sodium chloride which is 22.99+35.45

"the periodic table is arranged in order of atomic number."