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
zavuch27 [327]
3 years ago
13

A manganese electrode was oxidized electrically. If the mass of the electrode decreased by 225 mg during the passage of 1580 cou

lombs, what was the oxidation state of the manganese produced
Chemistry
1 answer:
qwelly [4]3 years ago
8 0

Answer:

<u>Oxidation state of Mn = +4</u>

Explanation:

Atomic mass of Mn = 55g/mol

From Faraday's law of electrolysis,

Electrochemical equivalent = \frac{mass}{charge}

i.e Z = \frac{m}{Q} = \frac{0.225g}{1580C} = 0.0001424 g/C

But Equivalent weight, E = atomic mass ÷ valency  = Z × 96,485

⇒ \frac{55}{valency} = 0.0001424 × 96,485

<u>∴ Valency of Mn = +4</u>

You might be interested in
We can preserve natural resources by
DedPeter [7]
The answer is c, relying on renewable energy sources
3 0
3 years ago
Help!!!!?????????? plssssssss
DIA [1.3K]

Answer: it’s b)

Explanation: that’s the only difference that is listed

4 0
3 years ago
Read 2 more answers
How many grams in 82 moles of CO2
Tems11 [23]

44.0 g/mol

hope it helps

6 0
3 years ago
A nuclear waste site. cesium-137 is a particularly dangerous by-product of nuclear reactors. it has a half-life of 30 years. it
hram777 [196]
The mass decay rate is of the form
m(t) = m_{0} e^{-kt}
where
m₀ = 3000 g,the initial mass
k = the decay constant
t = time, years.

Because the half-life is 30 years, therefore
e^{-30k} =  \frac{1}{2} \\\ -30k = ln(0.5) \\ k =  \frac{ln(0.5)}{-30} =0.0231

After 60 years, the mass remaining is
m = 3000 e^{-0.0231*60} = 750 \, g

Answer: 750 g

4 0
3 years ago
PLSSS HELP. And there’s also at the bottom of the picture another option if u didn’t see it
WARRIOR [948]

Answer:

B. Gradualism

Explanation:

8 0
3 years ago
Other questions:
  • The heat of combustion of butane , c4h10 , is 2874 kj/mol. what is the heat of combustion of butane, in kj per gram?(provide the
    15·2 answers
  • How many valence electrons do nitrogen atoms have
    15·1 answer
  • Please help due tomorrow
    15·1 answer
  • At equilibrium the total amount of the products
    8·1 answer
  • Tiffany was investing how fast it took Hayden to react to different sounds. Identify the independent variable.
    8·1 answer
  • What is the mass in grams of 1.22 x 10 to the 24th power atoms of gallium?
    6·2 answers
  • How many pennies are in $2,020.20?
    14·2 answers
  • Which situation would encourage competition
    5·2 answers
  • My made-up polyatomic ion goldate acts a lot like chlorate (it has the same charge and the same number of oxygens). What would t
    9·1 answer
  • What is the mass of three moles of chlorine?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!