1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erica [24]
3 years ago
6

Find percent yield:

Chemistry
1 answer:
saveliy_v [14]3 years ago
6 0

<u>Answer:</u> The percent yield of the reaction is 91.8 %

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}     .....(1)

  • <u>For B_5H_9 :</u>

Given mass of B_5H_9 = 4.0 g

Molar mass of B_5H_9 = 63.12 g/mol

Putting values in equation 1, we get:

\text{Moles of }B_5H_9=\frac{4g}{63.12g/mol}=0.0634mol

  • <u>For oxygen gas:</u>

Given mass of oxygen gas = 10.0 g

Molar mass of oxygen gas = 32 g/mol

Putting values in equation 1, we get:

\text{Moles of oxygen gas}=\frac{10g}{32g/mol}=0.3125mol

The chemical equation for the reaction of B_5H_9 and oxygen gas follows:

2B_5H_9+12O_2\rightarrow 5B_2O_3+9H_2O

By Stoichiometry of the reaction:

12 moles of oxygen gas reacts with 2 moles of B_2H_5

So, 0.3125 moles of oxygen gas will react with = \frac{2}{12}\times 0.3125=0.052mol of B_2H_5

As, given amount of B_2H_5 is more than the required amount. So, it is considered as an excess reagent.

Thus, oxygen gas is considered as a limiting reagent because it limits the formation of product.

By Stoichiometry of the reaction:

12 moles of oxygen gas produces 5 moles of B_2O_3

So, 0.3125 moles of oxygen gas will produce = \frac{5}{12}\times 0.3125=0.130moles of water

Now, calculating the mass of B_2O_3 from equation 1, we get:

Molar mass of B_2O_3 = 69.93 g/mol

Moles of B_2O_3 = 0.130 moles

Putting values in equation 1, we get:

0.130mol=\frac{\text{Mass of }B_2O_3}{69.63g/mol}\\\\\text{Mass of }B_2O_3=(0.130mol\times 69.63g/mol)=9.052g

To calculate the percentage yield of B_2O_3, we use the equation:

\%\text{ yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100

Experimental yield of B_2O_3 = 8.32 g

Theoretical yield of B_2O_3 = 9.052 g

Putting values in above equation, we get:

\%\text{ yield of }B_2O_3=\frac{8.32g}{9.052g}\times 100\\\\\% \text{yield of }B_2O_3=91.8\%

Hence, the percent yield of the reaction is 91.8 %

You might be interested in
Night vision glasses detect
lana [24]

night vision glasses detect energy

5 0
3 years ago
2NH4Cl(aq) + Ba(OH)2(aq) -&gt; BaCl2(aq) + 2NH3(aq) + 2H2O(1)
Akimi4 [234]

How do I answer that.

7 0
3 years ago
HELP FAST!!!
AfilCa [17]

Answer:

the fourth one I think....m

Explanation:

tfffffdd

7 0
2 years ago
To balance a half-reaction in basic solution, you need to add enough of which substances to balance the equation?
LenKa [72]
I'm not sure if this is what you're looking for, but I suppose you would have to have the solute and the solution to balance the reaction.
4 0
3 years ago
Read 2 more answers
The symbol for the hydroxide ion is _____. H + H 3 O - H(OH) OH -
dimulka [17.4K]
The symbol for the hydroxide ion is OH-
3 0
3 years ago
Read 2 more answers
Other questions:
  • What happens to hydrogen atoms at very high temperatures?​
    8·1 answer
  • What is the difference between the 3p sublevel and the 4p sublevel?<br><br> On the periodic table
    6·1 answer
  • Which is a nonpolar molecule?
    12·2 answers
  • Un atleta se dirige hacia la línea de salida a 6 m/s. Cuando pasa por la marca de 100 m, ponemos el cronómetro en marcha. Escrib
    5·1 answer
  • Why is platinum metal preferred to other metals for the flame test​
    8·2 answers
  • Complete the following reaction.
    12·1 answer
  • What is the molarity of a 0.250 L MgCl2 solution that contains 0.175 mol MgCl2?
    9·1 answer
  • A compound contains oxygen and chlorine. Its molecular mass is 166.9g. What is the molecular formula if its empirical formula is
    7·1 answer
  • Which of the following statements is true? Running an electric current through a magnet can create a magnetic field, Electrons a
    11·1 answer
  • The enthalpy of combustion for octane (C8H18(l)), a key component of gasoline, is -5,074 kJ/mol. This value is the Delta. Hrxn f
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!