Question

Convert 15.75 grams of Magnesium to atoms.

Answer 1

Answer:
`3.903* 10^(23)`

Step-by-step explanation:

Given

Mass of magnesium is
`m=15.75\ gm`

The molar mass of magnesium
`M=24.3\ g/mol`

No of moles in 15.75 g of magnesium is

`\Rightarrow n=(15.75)/(24.3)\\\\\Rightarrow n=0.648\ \text{moles}`

1 mole contains
`6.022* 10^(23)` atoms

So, 0.648 moles contain
`0.648* 6.022* 10^(23)`

`=3.903* 10^(23)\ \text{atoms}`