A mole is defined as containing approximately how many elementary entities?

A mole is defined as containing approximately how many elementary entities?

• A. 6.022 x 10^22
• B. 6.022 x 10^24
• C. 6.022 x 10^23
• D. 1.204 x 10^23

Answer: (C)

Counting extremely large numbers of particles is made practical by using the mole, a unit that links a macroscopic amount of substance to a specific number of elementary entities. One mole contains exactly 6.022 × 10^23 elementary entities, a value known as Avogadro's number. This constant lets you convert between how much substance you have in grams and how many atoms or molecules are present. For example, one mole of carbon-12 has a mass of 12 grams and contains 6.022 × 10^23 carbon atoms. The other numbers shown are not the standard counting constant used to define a mole, since they are tenfold off or correspond to unrelated counts.

Counting extremely large numbers of particles is made practical by using the mole, a unit that links a macroscopic amount of substance to a specific number of elementary entities. One mole contains exactly 6.022 × 10^23 elementary entities, a value known as Avogadro's number. This constant lets you convert between how much substance you have in grams and how many atoms or molecules are present. For example, one mole of carbon-12 has a mass of 12 grams and contains 6.022 × 10^23 carbon atoms. The other numbers shown are not the standard counting constant used to define a mole, since they are tenfold off or correspond to unrelated counts.