The graph shows the potential energy diagram for an unknown chemical change. Which chemical change could the graph represent? (1 point) Photosynthesis in plants Combustion of propane gas Electrolysis of sodium chloride Adding heat to decompose calcium carbonate

the correct answer is answer a. a mixture

no other options make sense

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  - sprinkles

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.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

i have no clue hope you find the answer