The density of of Hydrogen at STP is 0.09g/l .the number of Hygrogen molecules in small bubble of gas whose volume at STP is 0.03ml
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Explanation:
Density= 0.09=mass of gas/volume
=>0.09=m/0.00003
m=(0.09)(0.00003)= 27 X 10^-7
no of molecules of gas is given by (given mass/molar mass)6.022(10^23)
81.3 x 10^16 no of molecules
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