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lara31 [8.8K]
2 years ago
6

What determines which element an atom is ?

Chemistry
1 answer:
TiliK225 [7]2 years ago
3 0

The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.

hope this helps, if not, your free to give me 1 star

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If a 0.7 M solution of Ca(OH)2 dissociates completely in water, what is the<br> final [OH-]?
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Answer:

1.40 M [OH⁻]

Explanation:

This compound dissociates into 3 ions, but since we are asked about [OH⁻], it's only 2. Therefore, multiply the molarity of the solution by the number of ions that [OH⁻] dissociates into:

2 × 0.70 M = 1.40 M

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Divide the volume by the area. Using scientific makes things a bit cleaner.

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CO2 can be prepared using the following processes except *
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decomposition

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