Considering the definition of molar mass, the mass of one mole of C₃H₈ is 44 grams.
The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
The molar mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.
In this case, you know the molar mass of the elements is:
C= 12 g/mole
H= 1 g/mole
So, the molar mass of the compound C₃H₈ is calculated as:
C₃H₈ = 3 ×12 g/mole + 8 ×1 g/mole
Solving:
C₃H₈ = 44 g/mole
Finally, the mass of one mole of C₃H₈ is 44 grams.
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