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BARSIC [14]
3 years ago
13

Manganese (Mn) is a silver-colored metal. It

Chemistry
1 answer:
vladimir1956 [14]3 years ago
8 0

Answer:

A.

Explanation:

Manganese (Mn) is a silver-colored metal. It reacts with oxygen to form manganese oxide (MnO2), which has two oxygen atoms for every manganese atom. Which statement describes the properties of manganese oxide? It will be a gas because there are more oxygen atoms.

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The value of the equilibrium constant for the following chemical equation is Kr 40 at 25°C. Calculate the solubility of Al(OH)s(
dedylja [7]

Answer:

0,040 M

Explanation:

The global reaction of the problem is:

Al(OH) (s) + OH⁻ ⇄ Al(OH)₂⁻(aq) K= 40

The equation of equilibrium is:

K = \frac{[Al(OH)_{2} ^-]}{[Al(OH)][OH^-]}

The concentration of OH⁻ is:

pOH = 14 - pH = <em>3</em>

pOH = -log [OH⁻]

[OH⁻] = 1x10⁻³

Thus:

40 = \frac{[Al(OH)_{2} ^-]}{[Al(OH)][1x10^{-3}]}

<em>0,04M =  \frac{[Al(OH)_{2} ^-]}{[Al(OH)]}</em>

This means that 0,04 M are the number of moles that the solvent can dissolve in 1L, in other words, solubility.

I hope it helps!

7 0
3 years ago
C6H12O6 O3 NF3 Co KNO3 H2 CO<br><br> Which one of these are molecules list all that apply
marin [14]
Oh wow , what grade are you in ukliblo ?
7 0
3 years ago
27. The first five ionization energies of an element, X, are shown in the table. Ionization energy 1st 2nd 3rd 4th 5th Value / k
faust18 [17]

The correct formula of the oxide that forms when X burns in oxygen is X2O3.

Ionization energy is defined as the energy required to remove an electron from an atom. There are as many ionization energies present in an atom as there are electrons in that atom.

However, we can know the ionization energy values that belong to electrons in the outermost shell because they lie close together. If we go further into the inner shells, there is a sudden quantum jump in ionization energy values.

The element X must have three valence electrons because  631 ,1235, 2389 all refer to ionization energies of electrons in the valence shell. As we get into a core shell, there is a sudden jump hence the fourth and fifth ionization energies are 7089 and 8844 respectively.

The correct formula of the  oxide that forms when X burns in oxygen is X2O3.

Learn more: brainly.com/question/16243729

4 0
3 years ago
What happens when bluevitoal is heated?​
Anna [14]
When blue vitriol is heated, those water of crystallization escape out of the crystal and what's left is anhydrous copper sulphate or simply CuSO4, without any water of crystallization.
4 0
3 years ago
This image represents a(n)
Katena32 [7]

Answer:

mixture of nitrogen B

Explanation:

ok

7 0
3 years ago
Read 2 more answers
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