Question

Convert 4.86 x 104g of Mg to moles.

Answer 1

Step-by-step explanation:

Number of moles equal to the given mass divided by molar mass of the element or compound.

Mathematically, No. of moles =
`(mass given)/(Molar mass)`

The given mass is
`4.86 * 10^(4)` g and molar mass is 24.30 g/mol.

Therefore, calculate the number of moles as follows.

No. of moles =
`(mass given)/(Molar mass)`

=
`(4.86 * 10^(4) g)/(24.30 g/mol)`

=
`0.2 * 10^(4)` mol

=
`2 * 10^(3)` mol

or, = 2000 mol

Thus, we can conclude that
`4.86 * 10^(4)` g of Mg has 2000 moles.

Answer 2

Answer : The moles of magnesium (Mg) is,
`1.99* 10^3moles`

Solution : Given,

Mass of magnesium (Mg) =
`4.86* 10^4g`

Molar mass of magnesium (Mg) = 24.31 g/mole

Formula used :

`\text{Moles of Mg}=\frac{\text{Mass of Mg}}{\text{Molar mass of Mg}}=(4.86* 10^4g)/(24.31g/mole)=1.99* 10^3moles`

Therefore, the moles of magnesium (Mg) is,
`1.99* 10^3moles`