Answer:
2457.58×10²³ atoms of oxygen
Explanation:
Given data:
Number of moles of Na₂Cr₂O₇ = 58.3 mol
Number of atoms of oxygen = ?
Solution:
First of all we will calculate the number of moles of oxygen in 58.3 moles of Na₂Cr₂O₇.
1 mole of Na₂Cr₂O₇ contain 7 moles of oxygen.
58.3 mol × 7 = 408.1 mol
Number of atoms of oxygen:
1 mole contain 6.022×10²³ atoms
408.1 mol × 6.022×10²³ atoms / 1 mol
2457.58×10²³ atoms
