Average speed is worked out from dividing distance by time.
<h3>Iron - Fe</h3>
<h3>Hydrochloric Acid- HCl</h3>
<h2><u>Solution</u></h2>


Iron + Hydrochloric Acid
Ferrous Chloride + Hydrogen
<h2>
Hope This Helps You ❤️</h2>
The 3rd Quadrant is the lower left one on a graph,
where ' x ' and ' y ' are both negative.
Your picture is completely unrelated to this question.
I am pretty sure it’s B (carbon dioxide)