Question

How many moles are in 1.9 x 1046 atoms of chromium?

Answer 1

3.156 × 10²² atoms

Step-by-step explanation:

To find the number of moles in a substance given it's number of entities we use the formula

`n = (N)/(L) \\`

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

`n = \frac{1.9 * {10}^(46) }{6.02 * {10}^(23) } \\ = 3.156 * {10}^(22)`

We have the final answer as

3.156 × 10²² atoms

Hope this helps you