Question

Find the mass of 3.90*10^23 molecules of carbon dioxide

Answer 1

The mass of carbon dioxide is calculted below. Please see the image .

Answer 2

Answer: 28.5 g

Explanation:

1 mole of every substance contains Avogadro's number of particles and weighs same as it's molecular weight.

Here 1 mole of
`CO_2` contains
`6.023* 10^(23)` molecules of
`CO_2` and it weighs
`44g`

`6.023* 10^(23)` molecules weigh 44g

`3.90* 10^(23)` molecules weigh =
`(44g)/(6.023* 10^(23))* 3.90* 10^(23)`

= 28.5g