Answer: 23.6 grams HCl
Explanation:
The density 1.18g/mL just means that there is 1.18 grams of HCl per 1 mL of it.
So if you have 20 mL of it, it would just be 1.18 * 20 grams. This equals 23.6 grams of HCl.
It's just like if at your supermarket they sold apples for $1.00/lb. If you wanted 5 lbs, it would cost $5.00 ($1.00 * 5).
