Question

What is the mass of sodium (Na) in 50 grams of table salt (NaCl)? Show your work.

Answer 1

Answer:

19 g

Explanation:

Data Given:

Sodium Chloride (table salt) = 50 g

Amount of sodium (Na) = ?

Solution:

Molecular weight calculation:

NaCl = 23 + 35.5

NaCl = 58.5 g/mol

Mass contributed by Sodium = 23 g

calculate the mole percent composition of sodium (Na) in sodium Chloride.

Since the percentage of compound is 100

So,

                 Percent composition of sodium (Na) = 23 / 58.5 x 100

                  Percent of sodium (Na) = 39.3 %

It means that for ever gram of sodium chloride there is 0.393 g of Na is present.

So,

for the 50 grams of table salt (NaCl) the mass of Na will be

              mass of sodium (Na) = 0.393 x 50 g

              mass of sodium (Na) = 19 g