Answer:
9.0345 × 10¹⁸
Explanation:
Given:
Volume = 1.5 μL = 1.5 x 10⁻⁶ L
Molarity = 10 M
Now,
Number of moles = Molarity × volume
on substituting the values, we get
Number of moles = 10 × 1.5 x 10⁻⁶
or
Number of moles = 1.5 x 10⁻⁵
Also,
1 mole contains 6.023 × 10²³ molecules
therefore,
1.5 x 10⁻⁵ moles will contain = 6.023 x 10²³ × 1.5 × 10⁻⁵ = 9.0345 × 10¹⁸
Hence,
The number of C₆₀ molecules present are 9.0345 × 10¹⁸
