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EastWind [94]
3 years ago
14

For the chemical reaction

Chemistry
1 answer:
polet [3.4K]3 years ago
8 0

Answer:

806.3g

Explanation:

Given parameters:

 Number of moles of silver nitrate  = 4.85mol

Unknown:

Mass of silver chromate = ?

Solution:

         2AgNO₃ + Na₂CrO₄  →  Ag₂CrO₄ + 2NaNO₃

To solve this problem, we work from the known to the unknown;

  • The known specie here is  AgNO₃ ;

   From the balanced chemical equation;

          2 moles of AgNO₃  will produce 1 mole of Ag₂CrO₄

          4.85 moles of AgNO₃  will produce \frac{4.85}{2}   = 2.43moles of Ag₂CrO₄

  • Mass of silver chromate produced;

        mass = number of moles x molar mass

   Molar mass of  Ag₂CrO₄

    Atomic mass of Ag = 107.9g/mol

                                 Cr  = 52g/mol

                                  O  = 16g/mol

  Input the parameters and solve;

     Molar mass  = 2(107.9) + 52 + 4(16) = 331.8g/mol

  So,

        Mass of Ag₂CrO₄ = 2.43 x 331.8 = 806.3g

     

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miss Akunina [59]
The atomic weight of H is 1, O is 16.
There are two of each in a hydrogen peroxide molecule.
(1*2)+(16*2)=2+32
2+32=34
The weight of the whole molecule is 34, and hydrogen makes up 2 of that.
(2/34)*100=0.0588235294*100
0.0588235294*100=5.88235294

The percentage mass of hydrogen in a hydrogen peroxide molecule is 5.88%
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Brrunno [24]

The one that does not demonstrates the law of conservation of matter would be the third option: 2NO_2 + H_2O -- > HNO_3 + HNO_2

<h3>What is law of conservation of matter? </h3>

It is a law that explains that matters are conserved during the course of chemical reactions. They can neither be destroyed nor created.

Thus, the number of moles of the species in a reaction remains the same before and after the reaction.

Thus, an equation that demonstrates the law of conservation of matter will be balanced in terms of the number of moles of species.

The only equation, in this case, is 2NO_2 + H_2O -- > HNO_3 + HNO_2

There are 3 oxygen species on the reactant while 5 are present on the product side.

More on the law of conservation of matter can be found here: brainly.com/question/9434062

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8 0
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4 0
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tia_tia [17]
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ivolga24 [154]
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1 mole <span>HC₂H₃O₂ -------------- 60 g
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hope this helps!


7 0
3 years ago
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