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Sears and Zemansky's University Physics with Modern Physics | 13th Edition | ISBN: 9780321696861 | Authors: Hugh D. Young; Roger A. Freedman; A. Lewis Ford
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How many moles are in a 1.00-kg bottle of water? How many

Chapter 18, Problem 27E

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QUESTION:

Problem 27E

How many moles are in a 1.00-kg bottle of water? How many molecules? The molar mass of water is 18.0 g/mol.

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QUESTION:

Problem 27E

How many moles are in a 1.00-kg bottle of water? How many molecules? The molar mass of water is 18.0 g/mol.

ANSWER:

Solution 27E

Step 1 of  2:

How many moles are in a 1.00-kg bottle of water?

The molar mass M of a compound is the mass of 1 mole. It is equal to the mass m of a single molecule multiplied by Avogadro’s number,

  • Molar mass of water, M= 18 g/ mol

Which means 18g of water is equal to 1 mole

  • Mass of water, m= 1kg = 1000 g

Therefore 1000 g of water is equal to moles

That is, number of moles are in 1 kg(1000 g) of water is , = 55.55 moles

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