what is a mole and what is molar mass? what are the molar masses of magnesium...

what is a mole and what is molar mass? what are the molar masses of magnesium and atomic oxygen?

Expert Solution

Mole:

Mole is the amount of a chemical substance that contains as many elementary entities like atoms, molecules, as there are atoms in 12 grams of carbon-12, the isotope of carbon with relative atomic mass 12 by definition.

One mole is equal to 6.022×10 ²³

Molar mass:

The mass per mole of a substance is called its molar mass. Since the atomic mass unit is defined as 1/12 of the mass of the 12C atom, it follows that the molar mass of a substance, measured in grams per mole, is numerically equal to its mean atomic or molecular mass measured in amu.

Mg = 24.305 g/mol
O₂ = 15.9994 g/mol

queen_honey_blossom answered 2 years ago

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