Explanation:
It is given that 44.45 g of hydrocarbon gas produces 2649 kJ or
of heat.
Also here, 1 lb = 453.592 g.
Therefore, amount of energy released by 453.592 g of hydrocarbon gas will be calculated as follows.

= 
It is known that 1 J =
.
Hence,
= 
= 7.508 Kwh
Thus, we can conclude that the combustion of exactly one pound of this hydrocarbon gas produce 7.508 Kwh energy.
1.melting
2.freezing
3.condensation
4. evaporation
5.sublimation
Electrons carry a negative charge, so when you add on to the electron, the ion gets more negative.
hope this helps!
Answer: all the organisms blend in with their habitat
Explanation:
Hope that helped