Explanation:
The reason as to why the dark chocolate always melted the fastest was because of it's colour. It was a darker shade than the milk and white chocolate and the sun naturally absorbs dark colours therefore it melted faster.

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Answer: According to the Arrhenius concept, an acid is a substance that causes an increase in the concentration of H in aqueous solutions
Explanation:
According to the Arrhenius concept, an acid is a substance that ionizes in the water to give hydronium ion or hydrogen ion and a bases is a substance that ionizes in the water to give hydroxide ion .
According to lewis concept , an acid is a substance that accepts electrons and a base is a substance that can donate electrons.
The type of radiation in this scenario is Beta and is denoted as option C.
<h3>What is Beta radiation?</h3>
This is a high-speed electron which is emitted when the nucleus undergoes a radioactive decay during the process of beta decay.
In this scenario the electron is denoted as e with a superscript and subscript of 0 and -1 respectively which is the reason for the change from carbon to nitrogen.
Read more about Beta radiation here brainly.com/question/16645044
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<span>Dry ice is frozen carbon dioxide. It is easy to assume that the fog surrounds dry ice is carbon dioxide returning to it's gaseous however, you can not see that process. The vapors you see is the water molecules in the air condensing as a result of the cooling or energy removal by the dry ice. When energy is removed from water molecules they become colder and move slower than water in a gaseous. Similar to clouds in the air, the water condenses into a form that you can see.</span>