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enot [183]
2 years ago
10

What is the mass number of an isotope with an atomic number of 57 and that has 69 neutrons?

Chemistry
1 answer:
Karolina [17]2 years ago
7 0

Answer:

mass number=126

Explanation:

57+69=126

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Evgesh-ka [11]

Answer:    A chemical process must occur and then changes between the state of the reactants and the state of the products can be determined

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3 years ago
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The complete question can be seen in the image attached.

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Which of the following is an example of an environmental problem caused by chemicals
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