An electrochemical cell has the following overall reaction.

When nahco3 completely decomposes, it can follow this balanced chemical equation: 2nahco3 → na2co3 h2co3 determine the theoretic

BigorU [14]

Theoretical yield = 2.397

The product could be sodium carbonate

percent yield = 98.456%

When nahco3 completely decomposes, it can follow this balanced chemical equation:

2nahco3 → na2co3 h2co3

If the mass of the NaHCO3 sample is 3.80 g, we must use stoichiometry to calculate the theoretical yields of each of the products.

mass of NaHCO₃ = 3.80 g

molar mass of NaHCO₃ = 84 g/mol

so the no of moles of NaHCO₃ = 3.80/84 = 0.0452 mol

You see, one mole of sodium carbonate and one mole of hydrogen carbonate are produced from two moles of sodium bicarbonate.

so, the no of moles of sodium carbonate = 0.0452/2 = 0.0226 mol

∴ mass of sodium carbonate ( Na₂CO₃) = no of moles of Na₂CO₃ × molar mass of Na₂CO₃

= 0.0226 × 106 ≈ 2.397 g

no of moles of hydrogen carbonate = 0.0452/2 = 0.0226 mol

mass of the hydrogen carbonate ( H₂CO₃) = no of moles of H₂CO₃ × molar mass of H₂CO₃

= 0.0226 × 62 g = 1.401 g

mass of one of the products was measured to be 2.36 g , from above data, we can say it must be sodium carbonate because value is the nearest of 2.397 g.

percentage yield = experimental yield/theoretical yield × 100

here experimental yield of Na₂CO₃ = 2.36 g

and theoretical yield of Na₂CO₃ = 2.397 g

∴ % yield = 2.36/2.397 × 100 ≈ 98.456%

Therefore the percentage yield of the product is 98.456%

To learn more about percentage yield visit:

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6 0

2 years ago

Rico and Patrick love to go shark fishing. They wondered if a new brand of shark bait would help them catch more sharks. To test

posledela

Answer:

1. Patrick

2. old bait

3. new bait

4. great

Explanation:

hope this helps

6 0

3 years ago

Where would electrons in the d sublevel be found? Only in the n = 3 energy level in energy levels 3 possibly in any energy level

oksano4ka [1.4K]

<h3><u>Answer;</u></h3>

only in the n = 3 energy level

<h3><u>Explanation;</u></h3>

<em><u>The atom of a chemical element is made up of sub-atomic particles which are the neutrons, protons and electrons.</u></em> The neutrons and protons occupies the nucleus of an atom while the electrons occupy the energy levels.
<em><u>The first energy level (n=1) of an atom occupies a maximum of two electrons because it has only an S-orbital which can only have two electrons.</u></em>
<u>The second energy level (n=2) can have a maximum number of 8 electrons, since it contains, one S- orbital which can hold two electrons, and a p-orbital which can accommodate six electrons.</u>
<em><u>The third energy level (n=3) can have a maximum number of 18 electrons,</u></em> because it has <u><em>the S-orbitals which holds 2 electrons, the p-orbital which holds 6 electrons and the d-orbital which holds 10 electrons. </em></u>

5 0

4 years ago

according to the recipe for soap in the background 1 gallon of lye solution was required for 2 pounds of fat. how many liters ar

yawa3891 [41]

Answer:

3.785 L of lye solution needed for 907.185 g of fat

Explanation:

The computation of the number of grams in 2.00 pounds is shown below:

As we know that

One gallon of lye solution needed 2 fats pounds

Also,

1 gallon = 3.785 L

And,

1 lb = 453.592 g

So,

For 2 lb, it is

= 2 × 453.592

= 907.185 g

Therefore

3.785 L of lye solution needed for 907.185 g of fat

hence, the same is to be considered

3 0

3 years ago

In a certain organic compound, one of the carbon atoms is bonded to three atoms. One of these is a carbon atom and the other two

Arisa [49]

A double covalent bond.

<h3>Explanation</h3>

As their name suggest, ionic bonds are forces between ions of opposite charges. Ionic bonds involve the transfer of electrons from one atom to another. Such transfer can't occur between two carbon atoms. They belong to the same element and have the same tendency to gain or lose electrons. As a result, the bond between them cannot be ionic.

Ion dipole is a force <em>between</em> an ion and a molecule. The bond between the two carbon atoms is located <em>within</em> an organic molecule. The force between the two carbon atoms can't be ion dipole, either.

There are four valence electrons in each carbon atom. Each of them needs four more electrons to achieve an octet. They would achieve that octet by sharing four electrons with other atoms. Each shared electron pair acts as a covalent bond. Each hydrogen atom demands one more electron and would share only one electron with the carbon atom. The first carbon atom in this question shared two electrons with two hydrogen atoms. It needs to share two more with the other carbon atom so that it could achieve an octet. As a result, it would share two pairs of electrons, which will make a double covalent bond between the two carbon atoms.

6 0

3 years ago