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3 years ago

To determine the mass of CO2 that forms from a given mass of CaCO3, which of the following must be known? Check all that apply.

Chemistry

2 answers:

Pavlova-9 [17]3 years ago

7 0

Answer:

1 3 and 5

Explanation:

ZanzabumX [31]3 years ago

3 0

To determine the mass of CO₂, the following must be known :

the molar mass of CaCO₃
the mole ratio of CaCO₃ to CO₂
the molar mass of CO₂

<h3>Further explanation</h3>

Reaction

Decomposition of CaCO₃

CaCO₃ ⇒ CaO + CO₂

Given the mass of CaCO₃, so to determine the mass of CO₂ :

1. Find the mol of CaCO₃ from the molar mass of CaCO₃

$\tt n_{CaCO_3}=\dfrac{mass~CaCO_3}{MW~CaCO_3}$

2. Find the mole ratio of CaCO₃ : CO₂(from equation = 1 : 1)

$\tt n_{CaCO_3}\div n_{CO_2}=1\div 1$

3. Find the mass of CO₂ from the molar mass of CO₂

$\tt mass_{CO_2}=n_{CO_2}\times MW_{CO_2}$

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n = number of electrons in oxidation-reduction reaction = 2

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Now put all the given values in the above equation, we get:

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Using Nernest equation :

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Now put all the given values in the above equation, we get:

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