Fifty grams of which of the following substances contains the greatest number of moles?
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Question - Fifty grams of which of the following substances contain the greatest number of moles? Sodium carbonate Magnesium chloride Hydrogen gas
Given - Mass
Find - The greatest number of moles
Solution - The greatest number of moles are present in hydrogen gas.
For sodium carbonate
Molar mass = 106 gram/mol
Number of moles = 50/106
Number of moles = 0.47
For Magnesium chloride
Molar mass = 95 gram/mol
Number of moles = 50/95
Number of moles = 0.52
For Hydrogen gas
Molar mass = 1 gram/mol
Number of moles = 50/1
Number of moles = 50
So, the greatest number of moles are present in hydrogen gas.
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