Answer :
7 moles of CH₄ are contained in 112 g of that substance.
What are a mole and a molar mass?
One mole of a chemical is equal to 6.022 x 1023 molecules (or formula units) (ionic compound). A chemical's molar mass is equal to the mass of one mole of that substance. In other words, it provides you with the amount of grams per mole of a substance.
Atomic mass is the mass of a single compound unit, whereas molecular mass refers to the mass of a single mole of a compound. In essence, molar mass refers to the mass of a compound's average number of elements, whereas atomic mass refers to the mass of an individual atom.
Given mass = 112g
Molar mass of CH4 = ( 1 x 12 ) + ( 4 x 1) = 16 gmol-1
Number of moles = mass / Molar mass
Number of moles = 112 g / 16 gmol-1
Number of moles = 7 moles.
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