Determine the number of grams in Na present in 4.0g of NaOH.

The answer to your question is 2.3 g

Explanation:

Data

Molecule = NaOH

grams of Na in 4 g of NaOH

Process

1.- Calculate the molecular mass of NaOH

molecular mass = (1 x 23) + (1 x 16) + (1 x 1)

                          = 23 + 16 + 1

                          = 40 g

2.- Calculate the atomic mass of sodium

atomic mass = 23 g

3.- Use proportions to solve this problem

                     40 g of NaOH  4 g of NaOH

                      23 g of Na        x

                      x = (4 x 23) / 40

                     x = 2.3 g