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
bogdanovich [222]
3 years ago
11

In an experiment, 8.50 g of methane, CH4, was reacted with 15.9 g of oxygen gas to produce carbon dioxide and water. Determine t

he percentage yield if 9.77 g of carbon dioxide was obtained in the lab.
Chemistry
1 answer:
exis [7]3 years ago
7 0

Answer:

89.3 %

Explanation:

M(CH4) = 12+ 4*1 = 16 g/mol

M(O2) = 2*16 = 32 g/mol

M(CO2) = 12 + 2*16 = 44 g/mol

8.50 g * 1 mol/16 g = 0.5313 mol CH4

15.9 g * 1 mol/32 g = 0.4969 mol O2

9.77 g * 1 mol/44 g = 0.2220 mol CO2

1)                                  CH4        + 2O2 -----> CO2 + 2H2O

from reaction             1 mol          2 mol

given                       0.5313 mol   (0.4969 mol)

1 mol CH4              --- 2 mol O2

0.5313 mol  CH4  --- x mol O2

x= 2*0.5313 = 1.0626 mol O2

We can see that for given amount of CH4 we do not have enough O2, so O2 is a limiting reactant.

2)                               CH4        + 2O2 -----> CO2 + 2H2O

from reaction                             2 mol        1 mol

given                                      0.4969 mol   x mol

x = 0.4969*1/2 = 0.2485 mol CO2 theoretical yield

3)

Practical yield CO2 = 0.2220 mol

Theoretical yield CO2 = 0.2485 mol

% yield = (0.2220/0.2485)*100% = 89.3 %

You might be interested in
What are the extensive and intensive properties described in this experiment? Which properties would change and which would stay
kupik [55]

Answer:

No, because the amount of the matter stays the same.

Explanation:

3 0
2 years ago
Read 2 more answers
Which procedure would best allow a scientist to observe a chemical property of hydrochloric acid (HCI) solution?
makkiz [27]
Effervescence of h2 gas will be produced which burns off a glowing split with a pop sound when hcl reacts with a base
6 0
3 years ago
Read 2 more answers
A sample of gold (Au) has a mass of 45.39 g.
professor190 [17]
<span>1. What is the molar mass of gold?
Molar mass is a unit that expresses the mass of a molecule per one mol. The molar mass can be obtained by adding the neutron with the proton of the atoms. Gold has atomic number 79 so the proton is 79. The number of the neutron is 118. Then the molar mass would be: 79 + 118 = </span>197 g/mol<span>


</span><span>2. Calculate the number of moles of gold (Au) in the sample. Show your work. 
</span>In this question, you are given the mass of the gold and asked for how many moles the sample has. To find the number of moles you just need to divide the weight by the molar mass.
For 45.39 grams of gold, the number of moles would be:
45.39 / (197g/mol)= 0.23 moles


3. Calculate the number of atoms of gold (Au) in the sample. Show your work.Moles is unit of a number of molecules but 1 mol doesn't represent 1 molecule. The number of atoms can be obtained by multiplying the number of moles with Avogadro number. The calculation would be:
0.23 moles * (6.023 * 10^23 molecules/mol)= 1.387 * 10^23 molecules
8 0
3 years ago
Compound A has molecular formula C5H11Br. When compound A is treated with bromine in the presence of UV light, the major product
damaskus [11]

The compound (A) is 2-bromo-pentane. See attached picture for the chemical diagram.

Explanation:

2-bromo-pentane (A) reacts with bromine (Br₂) under UV light to form 2,2-dibromopentane and HBr. Also 2-bromo-pentane (A) reacts with NaSH to from pentane-2-thiol, which have an asimetric carbon, and NaBr.

You may find the chemical reactions and diagrams of the compounds in the attached picture.

Learn more about:

structure of organic compounds

brainly.com/question/9315917

brainly.com/question/13794915

#learnwithBrainly

6 0
3 years ago
Which of the following instrument would you use to see a plant cell?
Gemiola [76]
B . microscope
this is the answer .
3 0
3 years ago
Read 2 more answers
Other questions:
  • Is sodium hypochlorite an oxidizing or reducing agent?
    14·1 answer
  • Select the correct answer.
    6·2 answers
  • what mass of KCI ( solubility= 34.0 KCI/100 g water at 20 degrees celsius) can dissolve in 3.0x 10² g of water?
    13·1 answer
  • How many molecules of carbon monoxide are in 10 mL at STP
    10·1 answer
  • Two substances A and B react with each other in such a way that one-half of A remains after 25 min and one-fourth of A remains a
    6·1 answer
  • A balloon is inflated to a volume of 1.25L .If the temperature of the air inside is cooled from 35°C to 15°C , what will be the
    9·1 answer
  • What state of matter has no visible shape and fills its container?
    9·2 answers
  • ?;huguryutgiuiuiojcxfty
    11·1 answer
  • A precipitation reaction 2. A Lewis acid-base reaction the produces a coordination complex: A Lewis acid-base reaction the produ
    15·1 answer
  • A solution consists of 35.00 g of CuSO4 dissolved in 250.0 mL of water. The molar mass of Cu is 63.55 g/mol the molar mass of S
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!