Answer:
Mass = 1.85 g
Explanation:
Given data:
Number of formula units = 2.8×10²²
Mass of NaOH = ?
Solution:
1 mole contain 6.022×10²³ formula units
2.8×10²² formula units × 1 mol /6.022×10²³ formula units
0.46×10⁻¹ mol
0.046 mol
Mass of NaOH:
Mass = number of moles × molar mass
Mass = 0.046 mol × 40 g/mol
Mass = 1.85 g
