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Yuri [45]
2 years ago
10

Determine whether each statement is an example of a physical change or a chemical change. Newspaper yellows in the sun. Physical

chemical Wax melts on a hot stove. Physical chemical.
Chemistry
1 answer:
miss Akunina [59]2 years ago
7 0

Answer:

the newspaper one is a chemical change because the chemicals in the paper have reacted with something and turned a different color. the wax one is a physical change because it is a change in the phase of matter, which is always a physical change (still the same substance chemically)

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Use the image to answer the question.
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How many grams are in 0.36 moles of CCl4
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Answer:

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Explanation:

Hope this helps :)

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3 years ago
How many micrograms (ug) are in 3.4 x 10^-5 ounces (oz)
marysya [2.9K]

Answer:

964ug

Explanation:

The problem here involves converting from one unit to another.

 We are to convert from ounces to micrograms.

                                    1ug  = 1 x 10⁻⁶g

                                    1oz  = 28.35g

       

So we first convert to grams from oz then take to ug:

 Solving:

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             3.4 x 10⁻⁵oz  will then give  3.4 x 10⁻⁵ x 28.35 = 9.64  x 10⁻⁴g

So;

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Fission reactions generate thermal energy
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