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

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.