In the calculation above, we used the fuel value of graphite as a model for coal. Graphite is 100% carbon. However, the fuel value of coal varies from 15 kJ/gram to 32 kJ/gram. (2pts) Why is the fuel value of coal different from carbon (graphite)?
Why does the fuel value of coal have a range?

D. most models represent a real world object in a simpler way

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Idk the answer imthink snail cant mate they dont lol

Idon't know hope someone you