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juin [17]
2 years ago
11

Question 2 (Mandatory) (2 points)

Chemistry
1 answer:
Deffense [45]2 years ago
4 0
Electrons have a positive charge is the right answer
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something

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Mercury has an atomic number of 80 and a mass number of 200.
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Which polyatomic ion is found in the compound represented by the formula NaHCO3?
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Answer: The correct option is 2.

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Examples of polyatomic ions are: OH^- known as hydroxide ion, SO_4^{2-} known as sulfate ion

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18. Describe the relationship between kinetic energy and mass, and give an example of
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Answer:

Kinetic energy is directly proportional to mass

Explanation:

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Notice that if we keep velocity constant and only increase the mass of a object, the kinetic energy of that object would increase, as we've already emphasized the direct relationship between the kinetic energy term and the mass term.

Let's take a simple example: assume that object 1 and object 2 are both moving at the same velocity but object 1 has a much lower mass than object 2. According to the equation, object 1 has lower kinetic energy. This object can then transform all of its kinetic energy into some other form, say, heat the ground. The heat transferred will be significantly lower than by the object 2 moving at the same velocity but having a much greater mass.

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