Answer:
2. Behavioral Adaption
Explanation:
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Answer:
.Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.
Explanation:
The transfer of thermal energy is called heat. In this process, thermal energy moves through a substance. For example, an ice cube has heat energy and so does a glass of lemonade.
We have to convert 2100 kilojoule into calories.
2100 Kilojoule is equal to 500 Calories.
The chemical reaction gives off 2100 Kilojoule of heat energy which indicates that the reaction is exothermic in nature. Calorie and Kilojoule both are units of energy. We know, 1 calorie=4.2 kilojoule= 4.2 KJ. So 4.2 KJ is equal to 1 Calorie i.e, 4.2 KJ= 1 Calorie. So, to convert KJ to calorie, we have to divide the energy given in KJ by quantity 4.2. Hence, 2100 Kilojoule energy is equal to 
Calorie= 500 Calories.
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Answer:
12 hydrogen atoms are present.
Explanation:
The hydrocarbon is an alkane as it contains single covalent bonds.
The first carbon attaches to 3 hydrogen atoms, the second to fourth carbon attaches to 2 hydrogen atoms each and the last (fifth) carbon have 3 hydrogen atoms.
The Alkane compound is called PENTANE with molecular formula C5H12.
