Convert 15.75 grams of Magnesium to atoms.

Question

asked Apr 23, 2022 132k views

1 Answer

Cnmuc · Answer 1 · 2022-04-30T11:54:53+0000

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)

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