Question

how many chromium atoms are present in one mole of sodium chromate? na₂cro₄ 1.2 x 10²⁴ atoms 6.0 x 10²³ atoms 4.2 x 10²⁴ atoms 2.4 x 10²⁴ atoms

Explanation:

Step1: Identify Cr per formula unit

1 mole of $\text{Na}_2\text{CrO}_4$ has 1 Cr atom per molecule.

Step2: Calculate Cr atoms

Number of Cr atoms = $1 \times 6.022 \times 10^{23} \approx 6.0 \times 10^{23}$

Answer:

6.0 x 10²³ atoms