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DIA [1.3K]
3 years ago
15

The total number of valence electrons in a molecule of sof2 is ________.

Chemistry
1 answer:
tamaranim1 [39]3 years ago
7 0
Answer:
            There are 26 valence electrons in SOF₂.

Explanation:
                   Valence electrons are calculated by adding the valence electrons present in valence shell of each element present in SOF₂. So,

# of Valence e⁻s in S  =  6

# of Valence e⁻s in O  =  6

# of Valence e⁻s in F  =  7

# of Valence e⁻s in F  =  7

Now, add all valence electrons,

                                =  6 + 6 + 7 + 7

                                =  26 Valence Electrons
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If 2.1 moles of NaCl is dissolved in a solution with a total volume of 7.3 liters, what is the molarity of the solution? Round t
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Answer:

The molarity of the solution is 0.29 \frac{moles}{liter}

Explanation:

Molarity, or molar concentration, is a measure of the concentration of a solute in a solution, be it some molecular, ionic or atomic species. It is defined as the number of moles of solute that are dissolved in a given volume.

Molarity is calculated as the quotient between the number of moles of solutes and the volume of the solution:

Molarity=\frac{number of moles of solute}{volume}

Molarity is expressed in units \frac{moles}{liter}.

In this case:

  • number of moles of solute= 2.1 moles
  • volume= 7.3 liters

Replacing:

Molarity=\frac{2.1 moles}{7.3 liters}

Molarity= 0.29 \frac{moles}{liter}

<u><em>The molarity of the solution is 0.29 </em></u>\frac{moles}{liter}<u><em></em></u>

5 0
2 years ago
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What is the final, balanced equation that is formed by combining these two half reactions?
lara31 [8.8K]

Answer: Balanced equation that is formed by combining these two half reactions is Cu + NO^{-}_{3} + 2H^{+} \rightarrow Cu^{2+} + NO^{-}_{2} + H_{2}O.

Explanation:

A chemical equation which contains same number of atoms on both reactant and product side is called a balanced chemical equation.

For example, Cu \rightarrow Cu^{2+} + 2e^{-}

NO^{-}_{3} + 2e^{-} + 2H^{+} \rightarrow NO^{-}_{2} + H_{2}O

On cancelling the common species from both these half-reactions, the complete balanced equation will be as follows.

Cu + NO^{-}_{3} + 2H^{+} \rightarrow Cu^{2+} + NO^{-}_{2} + H_{2}O

Thus, we can conclude that balanced equation that is formed by combining these two half reactions is Cu + NO^{-}_{3} + 2H^{+} \rightarrow Cu^{2+} + NO^{-}_{2} + H_{2}O.

7 0
3 years ago
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5 0
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if the balance indicated that the evaporating dish has a mass of 44.8 g and you want to have exactly 5.0 g of copper. what shoul
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49.8 g should be the balance read.

Explanation:

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On the balance you put first the evaporation dish (or a watch glass) over which you add copper until you reach 49.8 g.

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