Question

How many moles of Na are in 42 g of Na?

Answer 1

Answer:

0.61 moles of Na are in 42 g of Na.

Answer 2

Given:

42 g of Na is present.

To Find:

A number of moles of Na are in 42 g of Na.

Solution:

To find the number of moles of Na are in 42 g of Na we will follow the following steps:

As we know,

Sodium has an atomic number = of 11 and 1 mole of sodium has molecular weight =grams.

1 mole of Na = 23 grams of Na

1 gram of sodium

$\frac{1}{23 \: } \: moles$

42 grams of sodium contains moles =

$\frac{1}{23} \times 42 = 1.82 \: moles$

Henceforth, moles of Na are in 42 g of Na is 1.82 moles.