Sterling silver contains 92.5% silver and 7.5% copper. A sterling silver dish weighs 185.0 g. What mass of copper is in the dish
2 answers:
<u>Answer:</u> The mass of copper in the dish is 13.875 grams.
<u>Explanation:</u>
We are given:
(m/m) % of copper = 7.5 %
This means that 7.5 grams of copper are present in 100 grams of solution.
We need to find the mass of copper in 185 grams of sterling silver dish.
To calculate the mass of copper, we use unitary method, we get:
In 100 g of sterling silver dish, the mass of copper is 7.5 grams.
So, in 185 grams of sterling silver dish, the mass of copper is =
Hence, the mass of copper in the dish is 13.875 grams.
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Answer:
The percentage deviation is %
Explanation:
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The concentration is of the solution is
The true absorbance A = 0.7526
The percentage of transmittance due to stray light %
Generally Absorbance is mathematically represented as
Where T is the percentage of true transmittance
Substituting value
%
The Apparent absorbance is mathematically represented
Substituting values
= 0.7385
The percentage by which apparent absorbance deviates from known absorbance is mathematically evaluated as
%
Since Absorbance varies directly with concentration the percentage deviation of the apparent concentration from know concentration is
%