Question

the number of carbon atoms present in 0.062 * mol of acetic acid, ch3cooh, is
a. 7.5 × 10²² atoms
b. 3.8 × 10²² atoms
c. 1.5 × 10²³ atoms
d. 6.0 × 10²³ atoms
options: b, d, a, c

Explanation:

Step1: Determine C atoms per molecule

Acetic acid (\(CH_3COOH\)) has 2 C atoms per molecule.

Step2: Calculate moles of C atoms

Moles of \(CH_3COOH = 0.062\) mol. Moles of C = \(2\times0.062 = 0.124\) mol.

Step3: Use Avogadro's number

Avogadro's number \(N_A = 6.022\times10^{23}\) atoms/mol. Number of C atoms = \(0.124\times6.022\times10^{23}\approx7.5\times10^{22}\) atoms.

Answer:

a. \(7.5\times 10^{22}\) atoms