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Leya [2.2K]
4 years ago
6

Problem PageQuestion Gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . If of w

ater is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water.
Chemistry
1 answer:
Nata [24]4 years ago
5 0

Answer:

<h2> = ( 1.08 / 2.2 ) 100% = 49%</h2>

Explanation:

Balanced Equation: 2CH₃CH₃(g) + 5O₂(g) → 2CO₂(g) + 6H₂O(g)

Calculate moles of CH₃CH₃ and O₂

1.2 ₃₃ ( 1 ₃₃/ 30.0694 ₃₃ ) = 0.040 ₃₃

8.6 ₂ ( 1 2/ 31.998 ₂ ) = 0.27 ₃₃

Find limiting reagent  0.040 ₃₃ ( 5 ₂/ 2 ₃₃ ) = 0.10 ₂

CH₃CH₃ is the limiting Reagent

CH₃CH₃ (L.R.) O₂ CO₂ H₂O

Initial (mol) 0.040 0.27 0 0

Change (mol) -2x=-0 -5x= -0.10  +2x=+0.040 +6x=+0.12

Final (mol) 0 0.117 0.040 0.12

0.040 − 2 = 0 = 0.020

Determine percent yield

0.12 ₂ ( 18.0148 ₂ /1 ₂ ) = 2.2 ₂  

= ( 1.08 / 2.2 ) 100% = 49%

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Wewaii [24]

Answer: 0.0450 moles of CaCl_2

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

\text{Number of moles of} CaCl_2=\frac{5.00g}{110.98g/mol}=0.0450moles

Thus there are 0.0450 moles of CaCl_2

6 0
4 years ago
Check all the answers that apply. Energy is the ability to
Juliette [100K]
Answer:

All the above.

Explanation:

Energy is defined as the ability to do work. And changes in every occur in all changes of matter. Energy is neither created nor destroyed in these changes, but simply changes from on form to another.
4 0
3 years ago
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Weak acids are poor conductors of:
valentina_108 [34]

Answer: Weak acids are poor conductors of electricity.

Explanation:

Weak acids are defined as the acids which dissociate weakly or partially when dissolved in water (polar solvent).

For example, CH_3COOH \rightleftharpoons CH_3COO^{-} + H^{+}

Due to less dissociation there will be less number of ions present in a solution of weak acid. As a result, a weak acid will be poor conductor of electricity.

As electricity is the flow of ions.

Thus, we can conclude that weak acids are poor conductors of electricity.

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4 years ago
Imagine that you push on a large rock. At what point does your effort change the rock’s mechanical energy?
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It changes when you have started pushing the rock because at that moment it has started moving
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The equation shows a --the breaking and forming of chemical bonds that leads to a change in the composition of matter. 2. In the
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Explanation:

when electronegativity difference is from 0.0 to 0.4 then bond formed between the two atoms is non-polar covalent in nature.

When electronegativity difference is greater than 0.4 and less than 1.8 then bond between the two atoms is a polar covalent bond.

When electronegativity difference is 1.8 or greater than the bond formed is ionic in nature.

According to the given fill ups, the reaction equation is as follows.

   C_{6}H_{12}O_{6} + 6O_{2} \rightarrow 6CO_{2} + 6H_{2}O

This means the new products are formed due to the change in chemical composition of the reactants.

  • Hence, the equation shows a chemical reaction - the breaking and forming of chemical bonds that leads to a change in the composition of matter.
  • And, in the given equation CO_{2} is a product.
  • In the equation, C_{6}H_{12}O_{6} is reactant.
  • In O_{2}, the type of bond that holds the two oxygen atoms together is a non-polar covalent bond.
  • In H_{2}O, the type of bond that holds one of the hydrogen atoms to the oxygen atom is a polar covalent bond.
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