Answer:
There are 1.8×1024 atoms in 1.5 mol HCl
Explanation:
Protons, it was once organized by atomic mass but organizing by protons turned out to be better
The order of the solutions from lowest to highest concentration : A, B, C
<h3>Further explanation</h3>
Given
the following solutions
Required
order of increasing concentration
Solution
Molarity shows the number of moles of solute in every 1 liter of solution.

Solution A : 0.5 moles : 2 L solution = 0.25 M
Solution B : 1 moles : 3 L solution = 0.33 M
Solution C : 1.5 moles : 4 L solution = 0.375 M
potential energy because it has a potential to roll down the hill, creating kinetic energy. it is idle