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ioda
3 years ago
14

Look at the diagram below, which shows an atom of an element. How many valence electrons does it have? Based on this, would the

atom be reactive or unreactive?

Chemistry
1 answer:
Cloud [144]3 years ago
4 0

Answer:

unreactive

Explanation:

because look at the picture the picture will show you easily

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How does the law of conservation of mass apply to this reaction
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8 0
3 years ago
The half-life of cobalt-60 is 5.3 years. after __________ years, 1/4 of the original amount of cobalt-60 will remain.
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The  number of  years  required  for 1/4  cobalt-60  to remain   after   decay  is calculated  as follows

  after  one  half life  1/2 of the original  mass isotope  remains

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4 0
2 years ago
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A chemist prepares a solution of sodium thiosulfate by measuring out of sodium thiosulfate into a volumetric flask and filling t
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Mass of sodium thiosulfate Na_{2}S_{2}O_{3} is 110. g

Volume of the solution is 350. mL

Calculating the moles of sodium thiosulfate:

110. g Na_{2}S_{2}O_{3} * \frac{1 mol Na_{2}S_{2}O_{3}}{158.1 g Na_{2}S_{2}O_{3}} = 0.696 molNa_{2}S_{2}O_{3}

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\frac{0.696 mol}{0.350 L} =  1.99 mol/L

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