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
DanielleElmas [232]
1 year ago
9

(Yield Problem)

Chemistry
1 answer:
alex41 [277]1 year ago
5 0

Answer:

Percent Yield Fe  =  82.5%

Explanation:

The actual yield is the value produced after an experiment is conducted. The theoretical yield is the value calculated using the balanced chemical equation and atomic/molar masses.

To find the percent yield of iron (Fe), you need to (1) convert grams Al to moles Al (via atomic mass), then (2) convert moles Al to moles Fe (via mole-to-mole ratio from equation coefficients), then (3) convert moles Fe to grams Fe (via atomic mass), and then (4) calculate the percent yield. It is important to arrange the ratios in a way that allows for the cancellation of units. The final answer should have 3 sig figs to reflect the sig figs of the given values.

Atomic Mass (Mg): 24.305 g/mol

Atomic Mass (Fe): 55.845 g/mol

3 Mg + 2 FeCl₃ -----> 2 Fe + 3 MgCl₂

20.5 g Mg           1 mole              2 moles Fe            55.845 g
-----------------  x  -----------------  x  ----------------------  x  -----------------  =  
                           24.305 g           3 moles Mg             1 mole

=  31.4 g Fe

                                     Actual Yield
Percent Yield  =  ----------------------------------  x  100%
                                 Theoretical Yield

                               25.9 g Fe
Percent Yield  =  --------------------  x  100%
                               31.4 g Fe

Percent Yield  =  82.5%

You might be interested in
A sample of fluorine gas exerts a pressure of 900 mmHg. When the pressure is changed to 1140 mmHg, the volume is 250 mL. What wa
UNO [17]
Let's use Boyle's Law here. P1*V1 = P2*V2
Given: (assuming that there are decimals at the end for Sig Figs)
P1 = 900.mmHg
P2 = 1140.mmHg
V1 = ???
V2 = 250.mL

900.mmHg* ??? = 1140.mmHg * 250.mL
??? = 1.27*250.mL
??? = 318.mL

Therefore, the original volume is 318mL.
8 0
2 years ago
How many moles are in 100.0g of gold
Mars2501 [29]
0.50769... It is just the 100g divided by golds molar mass, which is 196.97
5 0
3 years ago
If 43.1 g of O2 and 6.8 g of CO2 are placed in a 13.7 L container at 34 degrees C, what is the mixture of gasses?
jonny [76]

Answer:

The total pressure of the gas mixture = 2.76 atm

Note: The question is not complete. The complete question is as follow:

If 43.1 g of O2 and 6.8 g of CO2 are placed in a 13.7 L container at 34 degree Celsius , what is the pressure of the mixture of gases?

Explanation:

Mass of O₂ gas = 43.1 g, molar mass of O₂ gas = 32.0 g/mol

Number of moles of O₂ gas = 43.1/32.0 = 1.347 moles

Mass of CO₂ gas = 6.8 g, molar mass of CO₂ gas = 44.0 g

Number of moles of CO₂ gas = 6.8/44 = 0.155 moles

Total number of moles of gas mixture, n = (1.347 + 0.155) = 1.502 moles

Volume of gas mixture, V = 13.7 L

Temperature of gas mixture, T = 34 °C = (273.15 + 34) K = 307.15 K

Pressure of gas mixture = ?

Molar gas constant, R = 0.0821 liter·atm/mol·K.

Using the ideal gas equation: PV =nRT

P = nRT/V

P = (1.502 × 0.0821 × 307.15) / 13.7

P = 2.76 atm

Therefore, the total pressure of the gas mixture = 2.76 atm

5 0
2 years ago
How many grams of NaCl are needed to prepare 50.0 grams of a 35.0% salt solution?​
DiKsa [7]

Answer:  5.844 grams of NaCl needed to make solution.

Explanation:

3 0
3 years ago
Please help me please please :(
Annette [7]

Answer:

B. and A.

Explanation:

May I have the Brainlliest award?

3 0
3 years ago
Other questions:
  • Why is Fluorine, chlorine, bromine, and iodine grouped together?
    11·1 answer
  • A chemical equation that shows the same number of each kind of atom on both sides of the equation is said to be
    14·1 answer
  • I need help on 5 and 6
    15·2 answers
  • Lesson 04.01: Chemical vs. Physical Changes and Properties Define and identify chemical and physical properties and changes. Giv
    12·1 answer
  • The average time it takes for a molecule to diffuse a distance of x cm is given by t=x^2/2D where t is the time in seconds and D
    12·1 answer
  • I have to write a report (below) could someone start me off?
    11·1 answer
  • Briefly explain why the bulk temperature of the water remains low (at room temperature)
    10·1 answer
  • Which of these is an example of a physical change?
    15·2 answers
  • A toy car is released at the top of an inclined plane. How does the car's energy change as it rolls down the inclined plane? tel
    14·1 answer
  • Pop is made up of three major parts (water, carbon dioxide, and sugar). Assume that all other ingredients are present in insigni
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!