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Kitty [74]
3 years ago
15

How many atoms of cobalt are in one formula unit of cobalt (III) oxide? one two three six

Chemistry
2 answers:
IrinaK [193]3 years ago
7 0
I believe the correct answer is the second option. There will be two cobalt atoms in one formula unit of cobalt (III) oxide. It has a chemical formula of Co2O3. This compound is does not naturally occur so it is being synthesized. It is mostly used as bleaching agent.
Vanyuwa [196]3 years ago
6 0

<u>Answer:</u> The correct answer is two cobalt atoms.

<u>Explanation:</u>

Cobalt (III) oxide is a compound which is formed by the combination of cobalt and oxygen atoms.

The oxidation state of cobalt in the compound is +3 and the oxidation state of oxygen in the compound is -2.

Thus, by criss-cross method, the oxidation states of the ions becomes the subscipt of the other atom which represents the number of individual atoms in a compound. So, the chemical formula of cobalt (III) oxide becomes Co_2O_3

In the given compound, 2 atoms of cobalt are present and 3 atoms of oxygen are there.

Thus, the correct answer is two cobalt atoms.

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Iron(III) oxide is formed when iron combines with oxygen in the air.
Alisiya [41]

Answer:

Mass = 9.58 g  

Explanation:

Given data:

Mass of Fe₂O₃ formed = ?

Mass of Fe = 6.7 g

Solution:

Chemical equation:

4Fe + 3O₂        →    2Fe₂O₃

Number of moles of Fe:

Number of moles = mass/molar mass

Number of moles = 6.7 g/ 55.8 g/mol

Number of moles = 0.12 mol

now we will compare the moles of Fe and Fe₂O₃.

                         Fe         :          Fe₂O₃

                           4         :              2

                         0.12       :          2/4×0.12 = 0.06 mol

Mass of Fe₂O₃:

Mass = number of moles × molar mass

Mass = 0.06 mol  × 159.69 g/mol

Mass = 9.58 g  

8 0
2 years ago
What is a galvanic cell made of
Murrr4er [49]

Answer: Hello, The answer to this question is A galvanic cell consists of two different metals (electrodes) connected through a conducting solution (an electrolyte) and also connected externally completing a circuit.

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What is the molar mass of mgf2
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62.3018 g/mol is the molar mass
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Which reaction below represents the electron affinity of li? which reaction below represents the electron affinity of li? li(g)
gladu [14]
Electron affinity is related to the formation of negative ions. Electron affinity can be defined as "the change in energy of a neutral atom when an electron is added to the atom forming a negative ion" To be more specific, energy (in kJ/mol) with regards to atoms (in a gaseous state/phase) Thus, the correct representation for the electron affinity of Li is [Li (g) + e- <span>→ </span> Li- (g)]
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Write balanced equations and Kb expressions for these Brønsted-Lowry bases in water:(CH₃)₃N
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(CH3)3N + H2O ---> (CH3)3NH+  +  OH-

The equation of Kb:

Kb = [(CH3)3NH+][OH-]/[(CH3)3N]

<h3>What do we know about the process of dissolution?</h3>

A solute can dissolve in a solvent in a solid, liquid, or gaseous phase to create a solution through the process of dissolution. Solubility. The greatest amount of a solute that may dissolve in a solvent at a particular temperature is known as its solubility. The solution is said to as saturated when the maximum amount of solute is present.

Several variables influence solubility, including:

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To learn more about pKb:

brainly.com/question/14124805

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