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Andrew [12]
3 years ago
10

How old is Earth according to the geological time scale?

Chemistry
2 answers:
Ganezh [65]3 years ago
7 0
The answer is d that is how old it is.
muminat3 years ago
4 0
According to the time scale, Earth was formed approximately 4.6 billion year ago, so the correct answer is D.
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Organic Chemistry, 7e by L. G. Wade, Jr. Reactions of Alkenes Christine Hermann Radford University Radford VA Copyright © 2010 P
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Answer: Christine Herman & L.G Wade Jr., "2010". Organic Chemistry: Reaction of Alkane, 7e, Pearson Education, Radford University, Radford, VA.

Explanation:

This is an edited book. The Harvard reference style was used in the following order:

Authors name

Year of publication

Title

Edition

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Note that the title of book should be italicized with capitalization of first word.

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See the image below-⬇⬇-

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alekssr [168]

Answer:

 2H₂   +   O₂  →   2H₂O

Explanation:

The expression of the equation is given as:

              _H₂   +   2O₂  →   2H₂O

Now for expression above,

                           Reactants                                          Products

H                              2                                                            4

O                              4                                                           2

to balance the equation, we use 2 moles of hydrogen gas and 1 mole of oxygen gas;

           2H₂   +   O₂  →   2H₂O

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