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Question
Find the number of molecules of an ideal gas in a volume of 1.000 cm3 at STP.
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Solution
Here,
Volume of ideal gas at STP = 22.4 L
Number of molecules in 22.4 L of ideal gas at STP = 6.022\[\times\]1023
Number of molecules in 22.4\[\times\]103 cm3 of ideal gas at STP = 6.022\[\times\]1023
Now,
Number of molecules in 1 cm3 of ideal gas at STP =\[\frac{6 . 022 \times {10}^{23}}{22 . 4 \times {10}^3} = 2 . 688 \times {10}^{19}\]
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