Examine the reaction. H2(g) + O2(g) → H2O(l)

What coefficients will balance the equation?

a. 2, 1, 2
b. 1, 2, 1
c. 1, 1, 2
d. 2, 2, 2

first one is the correct answer

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.