Answer :
156.8L is the volume of 7 mol of hydrogen at STP.
What are moles?
A mole is defined as 6.02214076 × [tex]10^{23}[/tex] of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Volume of hydrogen at STP = moles x 22.4 = 7x22.4 = 156.8L
Hence, 156.8L is the volume of 7 mol of hydrogen at STP.
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