How Many Grams Of Propane, C3H8, Are Equivalent To 1.780 X 1026 Molecules Of Propane?

The number of moles in a sample is equal to the ratio of number of molecules present in the sample to the Avogadro's number.

Number of molecules of propane = 1.78 x 10²⁶

Moles = 1.78 x 10²⁶ / 6.022 x 10²³

Moles = 295.58

Moles = mass / molar mass

Molar mass of propane = 44

295.58 = mass / 44

Mass = 295.58 * 44

Mass of propane = 13005.52 grams