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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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Answer:

2 and 4

Explanation:

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For 2, the oxygen is simply heating up and expanding which pops the balloon. 4 is just a phase change of water vapor to liquid water.

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Question 4 (higher question)
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Answer:

Explanation:

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Brilliant_brown [7]

Answer:

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