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
frozen [14]
3 years ago
11

how many milliliters of 0.200 m fecl3 are needed to react with an excess of na2s to produce 2.75 g of fe2s3 if the percent yield

for the reaction is 65.0%?
Chemistry
1 answer:
Snezhnost [94]3 years ago
6 0

Answer:

We need 203 mL of FeCl3

Explanation:

Step 1: Data given

molarity FeCl3 = 0.200 M

Mass of Fe2S3 = 2.75 grams

Percent yield = 65.0 %

Step 2: The balanced equation

3 Na₂S(aq) + 2 FeCl₃(aq) → Fe₂S₃(s) + 6 NaCl(aq)

Step 3: Calculate moles Fe2S3

Moles Fe2S3 = mass Fe2S3 / molar mass Fe2S3

Moles Fe2S3 = 2.75 grams / 207.9 g/mol

Moles Fe2S3 = 0.0132 moles

Step 4: Calculate theoretical yield

65.0 % = 0.65 = actual yield/ theoretical yield

theoretical yield = actual yield / 0.65

theoretical yield = 0.0132 moles /0.65

theoretical yield = 0.0203 moles Fe2S3

Step 5: Calculate moles FeCl3

For 1 mol Fe2S3 and 6 mol NaCl we need 3 moles Na2S and 2 moles FeCl3

For 0.0203 moles Fe2S3 we need 2*0.0203 = 0.0406 moles FeCl3

Step 6: Calculate volume

Molarity = moles / volume

Volume = moles / molarity

Volume = 0.0406 moles / 0.200 M

Volume = 0.203 L = 203 mL

We need 203 mL of FeCl3

You might be interested in
Can someone help me with questions 8 and 9 plz. I will really appreciated it
puteri [66]

Answer:

8. A boat, cars, airplanes

9. It's safer to practice techniques on life sized models of human organs than practicing on an actual human. If you mess up on a model it doesn't matter, messing up on a human can put their life at risk.

5 0
3 years ago
2. When a drop of my pumpkin spice latte accidentally falls into the sploam, the substance begins to glow, then my room is fille
labwork [276]

Chemical because the first thing disappeared and changed into something completely different. Because you got something new from what you started with, it is chemical.

Idk why its pumpkin spice latte but I'm not going to judge. I prefer drinking bleach.

4 0
2 years ago
If you have 3 moles of CH4 , how many moles of CO2 are produced?
k0ka [10]

Answer:

Since you are producing 3.6 mol CO2, you can calculate the starting moles of CH4 with the simple mole-to-mole ratio: 1 mol CH4 / 1 mol CO2 as a conversion factor. Taking 3.6 mol CO2 x 1 mol CH4 / 1 mol CO2 = 3.6 mol CH4 (after canceling out the moles of CO2 on the top and bottom of the calculation)

Explanation:

7 0
2 years ago
WHAT IS THE MOLAR MASS FOR AMMONIUM SULFIDE?<br> A. 59.1g/mol<br> B.82.2g/mol<br> C.50.1g/mol
Jobisdone [24]

Answer:

68g/mol

Explanation:

The formula of ammonium sulfide is:

 Ammonium sulfide  = (NH₄)₂S

 The molar mass of a compound is the mass in gram of one mole of the substance. In a compound, it is expressed gram formula mass or gram-molecular weight.

 It is determined by the addition of the component atomic masses and then expressed in grams;

     Atomic mass of N = 14, H  = 1 and S = 32

 (NH₄)₂S  = 2[14 + 4(1)] + 32  = 36 + 32  = 68g/mol

3 0
3 years ago
What is the lowest energy level that contains d orbitals?<br><br> A. 3<br> B. 4<br> C. 2<br> D. 1
sweet [91]

Answer:

3!!!!!

Explanation:

3!!!!!

5 0
3 years ago
Other questions:
  • Select the correct answer from each drop-down menu.
    11·2 answers
  • Burning wood represents a chemical change.<br> True or False?
    8·2 answers
  • Determine the molecular geometry based on the description of bonding and lone pairs of electrons around the central atom. Three
    13·1 answer
  • Can matter undergo chemical reactions but still keep the same physical properties?
    15·1 answer
  • Which of these characteristics differentiate electrons from protons and neutrons
    15·1 answer
  • Which of these elements has an atom with the most stable outer electron configuration? * Cl Ca Ne Na
    6·1 answer
  • You need to produce a buffer solution that has a pH of 4.97. You already have a solution that contains 10. mmol (millimoles) of
    9·1 answer
  • There are 300 light particles in an airtight container. Which adjustment would increase the speed of the particles?
    7·1 answer
  • You are heating a piece of glass and now want to pick it up. you should?
    8·1 answer
  • Explain why the standard enthalpy of formation () for Cl2 (g) is zero, but its standard entropy is larger than zero.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!