Why is the following reaction classified as a single displacement reaction? FeSO4 (aq) + Zn (s) → ZnSO4 (aq) + Fe (s)
iron sulfate + zinc → zinc sulfate + iron

Describe what happens to the iron, zinc and sulfate during the reaction.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

c. 4.54 x 10–12 j happens to be correct