What is the number of moles of carbon in a sample containing 72.06 g o

What is the number of moles of carbon in a sample containing 72.06 g of carbon?

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UPSC Geoscientist – 2022

To find the number of moles of a substance, you divide the mass of the substance by its molar mass. The molar mass of carbon (C) is approximately 12.01 g/mol. Given the mass of carbon as 72.06 g, the number of moles is calculated as:
Number of moles = Mass / Molar Mass = 72.06 g / 12.01 g/mol ≈ 6.00 moles.

– The number of moles relates mass to the number of particles (atoms or molecules).
– Molar mass is the mass of one mole of a substance.
– The atomic mass of Carbon (C) is the basis for its molar mass.

The unit “mole” is the SI unit for the amount of substance. One mole contains approximately 6.022 x 10^23 particles (Avogadro’s number). The atomic mass unit (amu) is defined such that the atomic mass of Carbon-12 is exactly 12 amu. The molar mass in grams per mole is numerically equal to the atomic mass in amu.

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