How many molecules are in a sample of water, H₂O, which has a mass of 50.0 g?

Name: How many molecules are in a sample of water, H 2 O, which has a mass of 50.0 g?
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Question

Quizplus · Accepted Answer

To find the number of molecules, first calculate the number of moles of water using its molar mass (18.015 g/mol). Then multiply by Avogadro's number (6.022 × 10^23 molecules/mol). 50.0 g / 18.015 g/mol = 2.775 moles. 2.775 moles × 6.022 × 10^23 molecules/mol = 1.67 × 10^24 molecules.

How Many Molecules Are in a Sample of Water, H2O

How Many Molecules Are in a Sample of Water, H₂O