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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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Mᵣ:        180.16

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\text{Moles of CO}_{2} =\text{0.1360 mol C$_{6}$H$_{12}$O}_{6} \times \dfrac{\text{6 mol CO}_{2}}{\text{1 mol C$_{6}$H$_{12}$O}_{6}} = \text{0.8159 mol CO}_{2}

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We can use the Ideal Gas Law.

pV = nRT

Data:

p = 0.960 atm

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\begin{array}{rcl}pV &=& nRT\\\text{0.960 atm} \times V & = & \text{0.8159 mol} \times \text{0.082 06 L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times \text{310.15 K}\\0.960V & = & \text{20.77 L}\\V & = & \textbf{21.6 L} \\\end{array}\\\text{The volume of carbon dioxide is $\large \boxed{\textbf{21.6 L}}$}

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garik1379 [7]
Answer:
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