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
guajiro [1.7K]
3 years ago
15

A student isolated 7.2 g of 1-bromobutane reacting equimolar amounts of 1-butanol (10 ml) and NaBr (11.1 g) in the presence of s

ulfuric acid. The yield of the reaction is Select one: a. 95 % b. 48 % c. 84% d. 72 %
Chemistry
1 answer:
Alla [95]3 years ago
5 0

<u>Answer:</u> The percent yield of the 1-bromobutane is 48.65 %

<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 NaBr:</u>

Given mass of NaBr = 11.1 g

Molar mass of NaBr = 103 g/mol

Putting values in equation 1, we get:

\text{Moles of NaBr}=\frac{11.1g}{103g/mol}=0.108mol

The chemical equation for the reaction of 1-butanol and NaBr is:

\text{1-butanol + NaBr}\rightarrow \text{1-bromobutane}

By Stoichiometry of the reaction

1 mole of NaBr produces 1 mole of 1-bromobutane

So, 0.108 moles of NaBr will produce = \frac{1}{1}\times 0.108=0.108 moles of 1-bromobutane

  • Now, calculating the mass of 1-bromobutane from equation 1, we get:

Molar mass of 1-bromobutane = 137 g/mol

Moles of 1-bromobutane = 0.108 moles

Putting values in equation 1, we get:

0.108mol=\frac{\text{Mass of 1-bromobutane}}{137g/mol}\\\\\text{Mass of 1-bromobutane}=(0.108mol\times 137g/mol)=14.80g

  • To calculate the percentage yield of 1-bromobutane, we use the equation:

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

Experimental yield of 1-bromobutane = 7.2 g

Theoretical yield of 1-bromobutane = 14.80 g

Putting values in above equation, we get:

\%\text{ yield of 1-bromobutane}=\frac{7.2g}{14.80g}\times 100\\\\\% \text{yield of 1-bromobutane}=48.65\%

Hence, the percent yield of the 1-bromobutane is 48.65 %

You might be interested in
Astronomers send probes to other planets to take pictures of their surfaces. An astronomer thinks that briny water flows on Mars
aalyn [17]

Answer: the answer is B

Explanation:

3 0
3 years ago
(17.ooo+2.30)x1.0100=
Dmitry [639]

Answer:

19.493

Explanation:

6 0
2 years ago
Acetone, CH3COCH3, is a nonelectrolyte; hypochlorous acid, HClO, is a weak electrolyte; and ammonium chloride, NH4Cl, is a stron
natta225 [31]

Answer:

NH4Cl contains 0.2 mol of solute particles, CH3COCH3 contains 0.1 mol of solute particles, and HClO contains somewhere between 0.1 and 0.2 mol of solute particles

Explanation:

Strong electrolyte will dissociate completely and from 2 particles from one. weak electrolyte will form something in between because it won't dissociate completely. And nonelectrolyte won't dissociate at all.

7 0
3 years ago
How much energy in Joules is released by burning a cheese ball that raises the temperature of
aliya0001 [1]

Answer:

1. The heat energy in Joules is 5280.22J

2. The heat energy in calories is 1261.4 calories

Explanation:

Step 1:

Data obtained from the question.

The following data were obtained from the question:

Mass of water (M) = 74.2 g

Initial temperature (T1) = 24°C

Final temperature (T2) = 41°C

Change in temperature (ΔT) = T2 - T1 = 41 - 24 = 17°C

Heat energy (Q) =?

Recall:

Specific heat capacity of water = 4.186 J/g°C

Step 2:

Determination of the energy in Joules.

This is illustrated below:

Q = MCΔT

Q = 74.2 x 4.186 x 17

Q = 5280.22J

Step 3:

Conversion of the heat energy in Joules to calories. This is illustrated below:

4.186 J = 1 calorie

Therefore, 5280.22J = 5280.22/4.186 = 1261.4 calories

3 0
3 years ago
Predict which atom has the higher ionization energy. Mg Na
inysia [295]
The correct answer would be Mg
3 0
3 years ago
Other questions:
  • 61.0 mol of P4O10 contains how many moles of P
    5·2 answers
  • What food molecules make up lettuse
    11·1 answer
  • The type of compound that is most likely to contain a covalent bond is ________.
    6·1 answer
  • using the equaation 2h2+o2--&gt;2h2o if 10.0g of hydrogen are used in the presence of excess oxygen how many grams of water will
    6·1 answer
  • Select the ion.<br><br>1)Cu<br>2)PO4-3<br>3)SO2
    15·2 answers
  • How do newtons 3 laws relate ​
    13·1 answer
  • What happens to thermal energy as objects are heated up and cooled down?
    8·1 answer
  • Foods cook faster when placed in a pressure cooker. This is because the pressure on the surface of the water is (higher than/low
    12·1 answer
  • How many grams of oxygen are needed to produce 5.40 g of water according to this equation? 2 H2 (g) + O2 (g) ⟶ 2 H2O (l)
    15·1 answer
  • Which of these solutions is the most basic?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!