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## How do you calculate the number of 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 there in 24g of magnesium?

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 do you calculate moles from molarity?

To calculate the number of moles in a solution given the molarity, we **multiply the molarity by total volume of the solution in liters**.

## How do you find the moles of a compound?

**Divide the mass of the compound in grams by the molar mass you** just calculated. The answer is the number of moles of that mass of compound. For example, 25 grams of water equals 25/18.016 or 1.39 moles.

## How many moles are there in 48 grams of magnesium?

Here, we are given 48 g of Mg, therefore it is the given mass. 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.

## How many moles are in CH4?

(molar mass CH4 = 16.0 g/mol] G: **1.58 moles** CH4 D: ? g CH4 25.37 2.

## How many moons does 24 grams of magnesium?

There are **2 moles** in 24 g of Mg.

## What is gram mole?

(Often called gram-molecular weight.) **A mass of a substance in grams numerically equal to its molecular weight**. Example: A gram-mole of salt (NaCl) is 58.44 grams.

## How do you find moles from grams and molar mass?

To correctly estimate the number of moles, n , of a substance of a specific mass, m , (in grams), you need to follow the grams to moles formula: **n = m / M** , where, M is the molar mass of this material.