The answer is <span>increasing the surface area of Fe(s) and increasing the concentration of HCl(aq).
the rate of reaction can be increased if the interaction between the reactants in better. by increasing the surface area of a solid, such as Fe, you make more possible each molecule of Fe to interact with HCl. Also, by increasing the concentration of HCl, it mean there is more molecule of HCl to interact with Fe.</span>
A force called the effort force is applied at one point on the lever in order to move an object, known as the resistance force, located at some other point on the lever
I think that the answer is d
Explanation:
that u know right .........................