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Julli [10]
3 years ago
14

Consider the reaction.

Chemistry
1 answer:
Lelechka [254]3 years ago
7 0

Answer:837.9

Explanation:add those 2 numbers

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For question #12, use the following picture:<br><br> 12. What element is this? How do you know?
labwork [276]

Answer: The element shown in the image is Helium (He).

Explanation: We are given a image of an atom having protons, neutrons and electrons.

Number of protons as shown in image = 2

Number of neutrons as shown in image = 2

Number of electron as shown in image = 2

Atomic number = Number of protons = Number of electrons

Atomic number of the element = 2

Atomic Mass = Number of protons + Number of neutrons

Atomic mass = 2 + 2 = 4

The element having Atomic number = 2 and mass number = 4 is Helium.

Element = ^4_2\textrm{He}

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Answer:

C

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A set of attainable values for some physical quantity such as energy or wavelength
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When naming a compound made from a metal and a non-metal, what is done to the name of the second element?
RoseWind [281]
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Which of these is true about the mantle?
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