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We have to first find the number of moles of Freon-12 in the sample using the ideal gas law equation
PV = nRT
n =
since the number of moles at both conditions given and at stp we can write the following formula
where parameters for the given conditions are on the left side and parameters for STP conditions are on the right side of the equation
where P1 - pressure - 252.5 kPa
V1 - volume - 28.42 x 10⁻³ m³
R - universal gas constant
T1 - 331 K
STP conditions
P2 - 101 325 Pa
T2 - 273 K
substituting these values in the equation
V = 58.41 L
Volume at STP is 58.41 L
PV = nRT
n =
since the number of moles at both conditions given and at stp we can write the following formula
where parameters for the given conditions are on the left side and parameters for STP conditions are on the right side of the equation
where P1 - pressure - 252.5 kPa
V1 - volume - 28.42 x 10⁻³ m³
R - universal gas constant
T1 - 331 K
STP conditions
P2 - 101 325 Pa
T2 - 273 K
substituting these values in the equation
V = 58.41 L
Volume at STP is 58.41 L
<u>Answer:</u> The mass of zinc chloride produced in the reaction is 54.1 grams
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
.....(1)
- <u>For zinc:</u>
Given mass of zinc = 26 g
Molar mass of zinc = 65.4 g/mol
Putting values in equation 1, we get:
- <u>For HCl:</u>
Given mass of HCl = 42 g
Molar mass of HCl = 36.5 g/mol
Putting values in equation 1, we get:
The chemical equation for the reaction of zinc and HCl follows:
By Stoichiometry of the reaction:
1 mole of zinc reacts with 2 moles of HCl
So, 0.397 moles of zinc will react with = of HCl
As, given amount of HCl is more than the required amount. So, it is considered as an excess reagent.
Thus, zinc metal is considered as a limiting reagent because it limits the formation of product.
By Stoichiometry of the reaction:
1 mole of zinc produces 1 mole of zinc chloride
So, 0.397 moles of zinc will produce = of zinc chloride
Now, calculating the mass of zinc chloride from equation 1, we get:
Molar mass of zinc chloride = 136.3 g/mol
Moles of zinc chloride = 0.397 moles
Putting values in equation 1, we get:
Hence, the mass of zinc chloride produced in the reaction is 54.1 grams