The teacher repeated the experiment with a different sample of the oxide of copper. The teacher found that the oxide of copper produced 2.54 g of copper and
0.72 g of water.
Two possible equations for the reaction are:
Equation 1: Cu2O + H2 → 2 Cu + H2O
Equation 2: CuO + H2 → Cu + H2O
Determine which is the correct equation for the reaction in the teacher's experiment.
Relative atomic masses (Ar):
H = 1
O = 16
Cu = 63.5
[3 marks]

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.

56 moles of   lieter in chemistry

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds