How many moles are in 1kg ice/water?

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SUMMARY

1 kilogram of ice or water contains 55.55 moles of H2O. To determine this, first convert the mass from kilograms to grams, recognizing that 1 kg equals 1000 grams. The molar mass of water (H2O) is 18 grams per mole, allowing for the calculation of moles by dividing 1000 grams by 18 grams per mole, resulting in 55.55 moles.

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How many moles are in 1kg ice/water?
 
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This is a very simple molar mass problem.

First, convert kg to g.
Then, multiply the number of grams by the mol/molar mass ratio. Use the molar mass of H2O.

Since grams will be being multiplied by #mols/grams, the grams cancel, leaving the number of mols in 1 kg of water/ice.
 
Here is another simple explanation:

First convert the mass in kg to g ( 1kg=1000g). Now 18g of H20 is equivalent to 1 mole. Hence, 1000g of it would be equal to 1000/18 moles. This comes out be 55.55 moles. Thus 1 kg of water or ice has 55.55 moles of H20.
 

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