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
Arlecino [84]
3 years ago
12

What is the oxidation number of manganese (Mn) in potassium permanganate (KMnO4)?

Chemistry
2 answers:
irina [24]3 years ago
8 0

Answer:

+7

Explanation:

Within every molecule, there is always an oxidation number assigned to every individual atom within the molecule. Hydrogen will always have an oxidation number of +1 (because it only has one electron to give, and when it gives that electron, it has a charge of +1).

Elements in group 1 always have an oxidation number of +1, and elements in group 16 always have an oxidation number of -2. Using this information we can calculate the oxidation number of Mn in the molecule KMnO₄.

Overall the molecule is neutral, so all the oxidation numbers would add up to zero:

K + Mn + O₄ = 0

(+1) + Mn + 4(-2) = 0

(+1) + Mn + (-8) = 0

Mn + (-7) = 0

Mn = +7

andrezito [222]3 years ago
7 0

What is the oxidation number of manganese (Mn) in potassium permanganate (KMnO4)?

+3
+5
+6
+7

The oxidation number of manganese (Mn) in potassium permanganate (KMnO4) is +5. 

You might be interested in
Describe the range of the radii of most atoms
andriy [413]
The radii of most atoms are actually measured in the Ǻ, or Angstrom. We can do it in nanometers too, however. 
<span>First, we take the radius of the smallest atom, He (Helium). Atomic radius = .031 nm. The largest atom, stable atom is Fr (Francium), with atomic radius = .27 nm. </span>
<span>Therefore, the typical atomic radius is between .031 and .27 nm.</span>
8 0
3 years ago
How many valence electrons are there in sulfur, and iodine.
Vinil7 [7]

Today I will explain what a valence electron is and how many valence electrons each of the atoms your asking about have. :)

→ A valence electron is an electron in the outer shell of an atom that is able to participate in bonding. While iodine has 53 electrons, all but seven are in the inner shells of the iodine atom.

→ Sulfur has sixteen electrons in total, two in the inner shell, eight in the middle, and six in the outer. This means that sulfur has six valence electrons.

↑   ↑   ↑   Hope this helps! :D

7 0
3 years ago
A frying pan needs a Teflon coating of 1.00 mm in thickness to cover an area of 36.0 square inches. How many ounces of Teflon ar
Otrada [13]

Answer:

m = 0.659 ounce

Explanation:

It is given that,

The thickness of a Teflon coating is, d = 1 mm

Area of the coating, A = 36 inch²

The density of Teflon, d = 0.805 g/mL

We need to find ounces of Teflon are needed.

Firstly, find the volume of the Teflon needed,

1 inch² = 6.4516 cm²

36 inch² = 232.258 cm²

Density,

\rho=\dfrac{m}{V}

V is volume of the Teflon needed, V = Ad

So,

m=\rho V\\\\m=0.805\ g/cm^3\times 232.258\ cm^2 \times 0.1\ cm\\\\m=18.69\ g

Also, 1 gram = 0.035274 ounce

18.69 gram = 0.659 ounce

So, 0.659 ounces of Teflon are needed.

3 0
3 years ago
What are two ways to describe concentration? How do they differ from one another?
adell [148]

Answer:

no .........................

3 0
3 years ago
Read 2 more answers
A salt wedge forms in an estuary because
kherson [118]

Answer:

a rapidly flowing river discharges into the ocean where tidal currents are weak.

Explanation:

The force of the river pushing fresh water out to sea rather than tidal currents transporting seawater upstream determines the water circulation in these estuaries.

6 0
2 years ago
Other questions:
  • Converting forestland to urban areas through urban development could lead to which of the following? A. Less land available for
    8·2 answers
  • One disadvantage of nuclear power is that the waste produced is dangerous. The waste is dangerous because it is what?
    14·2 answers
  • Which of the following is NOT a physical property of matter?
    15·1 answer
  • 18. This reaction uses hydrogen
    9·1 answer
  • What happened to a balloon when it is put in freezer
    8·1 answer
  • 1. What is the main difference between a nuclear power plant and a coal burning power plant?
    7·1 answer
  • 29. Which alcohol combines with carboxylic acid to produce the ester called ethyl butanoate?
    14·1 answer
  • Please Help In Chemistry
    6·1 answer
  • When this equation is correctly balanced using smallest whole numbers, the coefficient of 02 is
    8·1 answer
  • Joseph divides 8.64 by 2.0. How many significant figures should his answer have?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!