Question

Please help!

Convert 1.86 x 1025 formula units of Mg(OH)2 to grams.

Answer 1

Answer : The mass of
`Mg(OH)_2` is, 1800.7 grams.

Explanation :

As we know that 1 mole of
`Mg(OH)_2` contains
`6.022* 10^(23)` atoms

And, 1 mole of
`Mg(OH)_2` has 58.3 g

So, we can say that:

As,
`6.022* 10^(23)` formula unit of
`Mg(OH)_2` present in 58.3 gram of
`Mg(OH)_2`

So,
`1.86* 10^(25)` formula unit of
`Mg(OH)_2` present in
`(1.86* 10^(25))/(6.022* 10^(23))* 58.3=1800.7` gram of
`Mg(OH)_2`

Therefore, the mass of
`Mg(OH)_2` is, 1800.7 grams.