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pychu [463]
3 years ago
7

3. What determines the mass number of an element? The mumhor of nrotons

Chemistry
2 answers:
ArbitrLikvidat [17]3 years ago
5 0

Answer: The number of protons and the number of neutrons determine an element's mass number.

Explanation:

gizmo_the_mogwai [7]3 years ago
3 0

Answer:

Protons and neutrons

Explanation:

The combined sum of protons and neutrons determine the mass

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Determine the oxidation state of the metal ion in [co(nh3)5br]2+. express your answer as an integer.
Zanzabum
                                           [Co(NH₃)₅Br]²⁺

Ligands and charges on them,

                             5 × NH₃  =  5 × 0  =  0

                             1 × Br⁻¹  =  1 × -1  =  -1

Charge on sphere  =  +2

So, putting values in equation,

                                       Co + (0)₅ - 1  =  +2

                                       Co + 0 - 1  =  +2

                                       Co - 1  =  +2

                                       Co  =  +2 + 1

                                       Co  =  +3

Result:
           Oxidation state of Co in [Co(NH₃)₅Br]²⁺ is +3.
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2 years ago
The amount of stored chemical energy is what determines the temperature of a substance.
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Answer:

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