How many molecules of nh3 could be made from 10 molecules of n2 and 30 molecules of h2?
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A gram of fat stores more energy than a gram of starch due to more C-H bonds within fat molecules relative to starch molecules.
The energy released/stored by nutrients is known as calorific value.
The calorific value of a substance is expressed in kilo calories(kcal).
1 kcal is defined the amount of energy required to raise the temperature of 1 kg of water by 1 °C.
The physiological calorific value of fats and carbohydrates is 9.0 kcal/g and 4.0 kcal/g respectively.
As it is evident from these values that the energy stored per gram of fat is more than the energy stored per gram of starch.
Now, the reason behind this difference in energies between these two molecules is due to the different number of C-H bonds present in them, as is evident from the adjoining images.
Therefore, A gram of fat stores more energy than a gram of starch due to more C-H bonds within fat molecules relative to starch molecules.
To know more about "calorific values", refer to the following link:
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