How many times lighter or heavier than air is hydrogen?

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Solution

Hydrogen is 14 times lighter than air, which means density of hydrogen is 14 times less than air.
$Density = Mass / Volume$
Suppose if you consider density of air is 14g/cm³, then density of hydrogen will be 1 g/cm³
Demonstration
Consider two balloons A and B. Balloon A was filled with Hydrogen gas and balloon B was filled with air and both of them were tied to the either side of a weighing scale. It was observed that weight scale is tilted to the side where balloon B was tied.

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