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
Gelneren [198K]
3 years ago
15

What is the cell potential for the reaction mg(s+fe2+(aq?mg2+(aq+fe(s at 77 ?c when [fe2+]= 3.40 m and [mg2+]= 0.210 m . express

your answer to three significant figures and include the appropriate units?
Chemistry
1 answer:
Galina-37 [17]3 years ago
8 0
First, you need to calculate the standard cell potential using standard reduction potential from a textbook or online. Since Mg becomes Mg+2, magnesium is being oxidized because it is losing electrons, you need to flip its potential

Fe+2 + 2e- --> Fe                  potential= -0.44
Mg+2 + 2e- --> Mg                potential= -2.37


Cell potential= (-0.44) + (+2.37)= 1.93 V

Now, you need to use Nernst formula to get the answer. I have attached a PDF with the work.
Download pdf
You might be interested in
Why is peer review important when publishing experimental results?
erastovalidia [21]
When publishing experimental results, it is always advisable to have your peer review those results. This peer can confirm the results that you got and thus they will be more reliable.

Also, you will be sure that what what you are publishing is correctly presented as it is always good to have a fresh eya to double-check what is written.
7 0
4 years ago
KClO₃ → Kelt Oz
cestrela7 [59]

Answer:

5.2 moles of  KClO₃  are needed

Explanation:

Given data:

Number of moles of potassium chlorate needed = ?

Number of moles of O₂ formed = 7.8 mol

Solution:

Chemical equation:

2KClO₃      →     2KCl + 3O₂

now we will compare the moles of KClO₃ and  O₂.

                   O₂        :         KClO₃    

                    3          :           2

                   7.8        :          2/3×7.8 = 5.2

5.2 moles of  KClO₃  are needed.

5 0
3 years ago
She put on her coat and went out <br>what type of sentence is this ​
Zinaida [17]

Answer:

this is an example of a Simple sentence

3 0
3 years ago
Read 2 more answers
A certain voltage is applied to a copper wire and to a germanium wire of the same thickness and length. how will the current in
Elena-2011 [213]
Answer : The current will flow more easily and quickly through the copper wire, on application of voltage because copper is a metal which is good conductor of heat and electricity.

In case of germanium it is a semi-conductor means it will behave as a conductor under certain circumstances.

So if we take same length and same thickness of both the wires, current is more likely to flow through the copper wire than the germanium wire.
7 0
3 years ago
The pH of a certain orange juice is 3.33.Calculate the +ion concentration.
Sphinxa [80]

Answer:

4.67\times 10^{-4}

Explanation:

Given that,

The pH of a certain orange juice is 3.33.

We need to find the +ion concentration.

We know that,

pH=-log[H^+]

So,

3.33=-log[H^+]\\\\\[H^+=10^{-3.33}\\\\=4.67\times 10^{-4}

So, the +ion concentraion is equal to 4.67\times 10^{-4}.

5 0
3 years ago
Other questions:
  • What was helium used for in the past?
    12·2 answers
  • You need to prepare 250. ml of a 0.600 m aqueous solution of sucrose, c12h22o11(aq, which is used frequently in biological exper
    12·1 answer
  • A container holds 6.4 moles of gas. hydrogen gas makes up 25% of the total moles in the container. if the total pressure is 1.24
    6·2 answers
  • What did Thomson’s model of the atom include that Dalton’s model did not have?
    10·2 answers
  • Which phrase is the best definition of science?
    15·1 answer
  • A student added 3 gms one substance in a beaker and then added 4 gms of another substance. A chemical reaction took place in the
    6·1 answer
  • What are the two sources of energy for the Earth system?
    8·1 answer
  • CH4 + 202 → CO2 + 2H2O<br> How many grams of O2 needed to produce 36 grams of H2O?
    10·1 answer
  • How many significant figures are there in the measurement 0.0034 Kg?
    9·2 answers
  • Help me answer this question for points!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!