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Vladimir [108]
3 years ago
9

Which of these elements has four valence electrons

Chemistry
1 answer:
exis [7]3 years ago
7 0
What are the elements?

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Calculate the molarity of the solution formed when 0.72 moles of CaBr2 is dissolved in 1.50 L water.
xxTIMURxx [149]

Answer:

The molarity of the formed CaBr2 solution is 0.48 M

Explanation:

Step 1: Data given

Number of moles CaBr2 = 0.72 moles

Volume of water = 1.50 L

Step 2: Calculate the molarity of the solution

Molarity of CaBr2 solution = moles CaBr2 / volume water

Molarity of CaBr2 solution = 0.72 moles / 1.50 L

Molarity of CaBr2 solution = 0.48 mol / = 0.48 M

The molarity of the formed CaBr2 solution is 0.48 M

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3 years ago
Explain the law of conservation of energy. Give a specific example using kinetic and potential energy that shows how energy is c
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Law of conservation of energy states that energy can neither be created nor can be destroyed but can be changed from one form to another

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How many electron pairs are shared by an oxygen molecule?​
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Two electron pairs is the answer

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Match the following items. 1. high-intensity bundle of energy being emitted from some decaying nuclei gamma ray 2. particle radi
AysviL [449]

Answer:

  1. High-intensity bundle of energy being emitted from some decaying nuclei = gamma ray  
  2. Particle radiating from the nucleus of some atoms = alpha particle  
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8 0
4 years ago
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The zinc replaced the copper ion. Therefore, the
Dafna1 [17]

Answer:

Zinc Sulfate

Explanation:

The balanced chemical equation is :

Zn(s) + CuSO_{2}(aq)\rightarrow ZnSO_{4}(aq) + Cu(s)

Zinc being more reactive than copper, replace the copper from copper sulfate (blue)and form zinc sulfate .

This is displacement reaction

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3 years ago
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