Rachel has a sample containing 2 moles of carbon. How many atoms of carbon are in this sample?

a. 2.044 * 1023 atoms

b. 6.022 * 2023 atoms

c. 1.204 * 1024 atoms

d. 6.022 * 1046 atoms

Answer is: c. 1.204 * 10²⁴ atoms of carbon.

n (C) = 2 mol; amount of substance of carbon.

Na = 6.02·10²³ 1/mol; Avogadro constant (the number of constituent particles, in this example atoms, that are contained in the amount of substance given by one mole).

N (C) = n (C) · Na.

N (C) = 2 mol · 6.02·10²³ 1/mol.

N (C) = 12.04·10²³ = 1.204·10²⁴; number of carbon atoms in a sample.

Answer is C

Explanation:

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