Trimix is a general name for a type of gas blend used by technical divers and contains nitrogen, oxygen and helium. In one Trimi
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<u>Answer:</u> The theoretical yield and percent yield of chromium (III) oxide is 434.72 grams and 92.6 % respectively.
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
.....(1)
Given mass of = 480.1 g
Molar mass of = 84 g/mol
Putting values in equation 1, we get:
For the given chemical equation:
By Stoichiometry of the reaction:
4 moles of produces 2 moles of chromium (III) oxide
So, 5.72 moles of will produce =
of chromium (III) oxide
Now, calculating the mass of chromium (III) oxide from equation 1, we get:
Molar mass of chromium (III) oxide = 152 g/mol
Moles of chromium (III) oxide = 2.86 moles
Putting values in equation 1, we get:
To calculate the percentage yield of chromium (III) oxide, we use the equation:
Experimental yield of chromium (III) oxide = 402.4 g
Theoretical yield of chromium (III) oxide = 434.72 g
Putting values in above equation, we get:
Hence, the theoretical yield and percent yield of chromium (III) oxide is 434.72 grams and 92.6 % respectively.
<u>Answer:</u> The experimental van't Hoff factor is 1.21
<u>Explanation:</u>
The expression for the depression in freezing point is given as:
where,
i = van't Hoff factor = ?
= depression in freezing point = 0.225°C
= Cryoscopic constant = 1.86°C/m
m = molality of the solution = 0.100 m
Putting values in above equation, we get:
Hence, the experimental van't Hoff factor is 1.21