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Galina-37 [17]
2 years ago
14

Can someone answer this question? It's not that long

Chemistry
1 answer:
Kitty [74]2 years ago
6 0

Answer:

sections 2 and 3

Explanation:

logic

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If an isotope of an element has 33 neutrons and a mass number of 64, how many electrons must it have?
larisa [96]
The mass number is the sum of the protons and neutrons
64 = #protons + #neutrons
Find the number of protons given the number of neutrons
64 = #protons + 33
#protons = 31
In a neutral element (such as this), the number of electrons equals the number of protons
#electrons = #protons
#electrons = 31
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How many moles of C2H2 are needed to react completely with 84.0 mol O2?
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