Because elemental mercury is a liquid at a room temperature
These are called subscript number.
That is the number below the normal line of test are called subscript number.
This number indicate the indicate the number of atoms of the element present in the chemical formula.
In both of these C₆H₁₂O₆ and H₂O, the number written below the line of the text are called subscript numbers.
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The average speed must be 30mph so this means the car traveled for 2hrs 60/30
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