**Contents**show

## How many moles are in sodium hydroxide?

The molar mass tells you the mass of exactly **one mole** of a given substance. In this case, sodium hydroxide has a molar mass of 39.997 g mol−1 , which implies that one mole of sodium hydroxide has a mass of 39.997 g .

## What is the mass of 3 moles of NaOH?

Now use this to convert 120 g to moles. Now take 120 grams NaOh and multiply this by 1 mol NaOH/ 40 grams NaOH. You can cancel out the grams and you have moles left. Now you do 120 x 1 / 40 and you get 3 moles of NaOH!

## How do you find the molar mass of NaOH?

So, its molar mass is 22.989+15.999+1.0079=**39.996 g/mol** to 5 sig figs.

…**Thus, its molar mass involves:**

- MNa=22.989 g/mol.
- MO=15.999 g/mol.
- MH=1.0079 g/mol.

## What is the mass of 0.5 moles of NaOH?

In order to get grams, you’ll have to convert one of the volume units. I’ll do it this way: (0.5 moles/liter NaOH) * (0.2 liter end volume) * (40.0 g/mole) = amount to weigh out Now the units cancel, except for grams, giving **4.00 g**.

## What is the mass of 0.5 mole of sodium hydroxide?

However, in expressing the concentration as M (molarity) the volume of the solution is also taken into account. Thus, 0.5 mole of NaOH represents simply **20 g** of the base while 0.5 M means 20 g of the base or NaOH dissolved per litre of the solution.

## What is the mass in grams of 2 moles of carbon?

From the above concept of mole we tell that one mole of carbon contains [12g] of carbon, which is the molar mass of carbon. So the amount of carbon present in [2] moles of carbon =[2 times 12{text{ }}g = **24g]**.

## What is the molar mass of 2 moles of water?

One mole of H2O is made up of 2 moles of Hydrogen atoms and 1 mole of Oxygen atom. Mass of two moles of Hydrogen atoms = 2x 1 g/mol = **2 g/mol**.

## What is mole and molar mass?

The molar mass of a substance is **the mass in grams of one mole of that substance**. This mass is given by the atomic weight of the chemical unit that makes up that substance in atomic mass units (amu). For example, silver has an atomic weight of 107.8682 amu, so one mole of silver has a mass of 107.8682 grams.