You are watching: How much does a mole of water weigh
How lot is a mole the water? A mole the water is Avogadro’s number of water molecules. Avogadro’s number is so large that it can be difficult to imagine its size. Finding the mass and also volume of one mole of water is a great way to relate the devices to something familiar. Below is the calculation for the the mass and also volume the one mole of water.
Quick Mole Review
The mole (symbol: mol) is one SI unit for the variety of particles in a substance. One mole is specifically 6.02214076 x 1023 particles. For most calculations, the number is rounded come 6.022 x 1023. This number is Avogadro’s number and also its dimension was liked so the the fixed of one mole of a link in grams is approximately equal to the mean mass of a single molecule in daltons or atom mass devices (amu).
Find the mass of 1 Mole the Water
One mole the water is 6.022 x 1023 water molecules. To uncover the mass of one mole of water, follow this steps:Find the chemistry formula. The chemistry formula because that water is H2O. So, each water molecule has actually two atom of hydrogen and also one atom that oxygen.Add the atomic masses that the aspects to find the fixed of one mole. The atomic mass is the variety of grams per mole that a substance. Include up the atom masses of every the atoms in a formula to uncover the mass of one mole of the compound.
Mass that 1 mole of water = fixed of hydrogen + fixed of hydrogen + fixed of waterMass of 1 mole the water = 1.0079 g + 1.0079 g + 15.9995 gMass the 1 mole of water = 18.0152 g
The fixed of one mole that water is around 18 grams. How lot water is this? uneven you are familiar with little masses, this number probably doesn’t average much to you. It’s easier to recognize the lot of water if you convert the mass to volume.
Find the Volume that 1 Mole the Water
If you recognize mass, you can uncover volume if you recognize density:
Density = fixed / volume
Rearranging the equation:
Volume = massive / density
The thickness of water varies relying on temperature and also pressure, but it’s very nearly 1 gram every milliliter. Plugging the mass and also density into the equation offers the volume of one mole the water:
Volume = massive / densityVolume of 1 mole that water = (18 g) / (1 g/ml)Volume the 1 mole that water = 18 ml
One mole the water is around 18 milliliters.
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This is the volume the a few drops the water, 3.65 teaspoons, 1.2 tablespoons, or 0.018 liters. It’s no a big volume, however it consists of 6.022 x 1023 water molecules!
You have the right to use the same actions to find the mass and volume of any kind of other substance. But, the massive in grams and also volume in milliliters are only the exact same for water and also other substances with a thickness of 1 g/ml.