Question

How many atoms are in 11.9 moles of chromium?

Answer 1

Use the following equation:
Given # of moles * molar mass (g) per mol = Mass (g)
This gives us 11.9 x 51.9962 (g) per mol.

618.75 moles

Answer 2

`7,16.10^(24)`

Step-by-step explanation:

We know that in 1 mole of any substances there are
`6,02. 10^(23)` atoms

This number (
`6,02. 10^(23)`) is a constant that is known as the avogadros number

if we know how many atoms are in a mole of chromium to calculate how many there are in 11.9 moles we apply a simple rule of three

`1 mol Cr\longrightarrow 6,02.10^(23) atoms\\ 11.9 moles Cr\longrightarrow x\\x=((11.9)(6,02.10^(23)))/(1)\\ x= 7,16.10^(24) atoms`

In 11.9 moles of chrome there are
`7,16.10^(24)` atoms