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## How many moles are in 1 gram of magnesium?

The relative masses of each element can be found on the periodic table. For example, one atom of magnesium weighs 24.31 amu (atomic mass units). However, **one mole of magnesium weighs 24.31 g**. (Moles were planned that way!)

## How many moles are in 48g of magnesium?

Now, coming back to the formula to find the number of atoms. Therefore, number of atoms in 48 g of Mg = **2 mol** $ times $ $6.022 times {10^{23}}$atoms/mol= [12.04 times {10^{23}}] atoms. Thus, 48 g of Mg is equivalent to $12.04 times {10^{23}}$ atoms. Hence, option A is the correct answer.

## How do you calculate moles of magnesium?

**Example calculation:**

- Mass magnesium = 2.39 g.
- Mass magnesium oxide = 3.78 g.
- So mass oxygen = 1.39 g.
- Number moles Mg = 2.39/24 = 0.0995.
- Number moles O = 1.39/16 = 0.0868.
- Divide by the smallest to give the ratio aproximately 1 Mg : 1 O.
- This would suggest a formula of MgO, which is the correct formula.

## How many moles are in 24g of magnesium?

Moles of elements

Because magnesium atoms each have twice the mass of carbon atoms ( ^{24}Mg compared with ^{12}C), **one mole** of magnesium has a mass of 24 g.

## How many moles are in MgO?

To find the molar quantity, we simply divide the mass by the molar quantity, to get an answer in moles : Moles of MgO = **42.5⋅g 40.3⋅g ⋅mol−1**=1.05⋅mol .

## How many moles of manganese are in 1.00 g?

1.00g Mn – **25 mol Mn** How many moles of carbon are in 1.00 g?

## What is the percent by mass of magnesium in MGO?

The percent composition of magnesium in magnesium oxide is **39.70 %**.