Answer:
[tex]10^{-10}[/tex] particles
Explanation:
Given that,
Speek of dust weighs [tex]1.6\times 10^{-10}\ kg[/tex]
We need to find the number of such particles that would weight 1.6 kg.
Let there are n number of particles.
It can be calculated as :
[tex]n=\dfrac{\text{Total weight}}{\text{Weight of each particles}}\\\\=\dfrac{1.6}{1.6\times 10^{-10}}\\\\=10^{10}[/tex]
Hence, there are [tex]10^{-10}[/tex] particles.