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satela [25.4K]
3 years ago
14

an alloy contains 56g of pure silver and 22g of pure copper what is the percentage(%) of silver in the alloy?

Chemistry
2 answers:
Lerok [7]3 years ago
6 0
To get the ans divide 5600by 78 and there is ur answer
gizmo_the_mogwai [7]3 years ago
4 0

<u>Answer:</u> The percentage of silver in the alloy is 71.8 %.

<u>Explanation:</u>

To calculate the percentage composition of a substance in a mixture, we use the equation:

\%\text{ composition of substance}=\frac{\text{Mass of substance}}{\text{Mass of mixture}}\times 100

We are given:

Mass of pure silver = 56 g

Mass of pure copper = 22 g

Mass of alloy = 56 + 22 = 78 g

Putting values in above equation:

\%\text{ composition of silver}=\frac{56}{78}\times 100=71.8\%

Hence, the percentage of silver in the alloy is 71.8 %.

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6 0
3 years ago
A 0.67 gram sample of chromium is reacted with sulfur. The resulting chromium sulfide has a mass of 1.2888 grams. What is the em
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Answer:

Cr₂S₃

Explanation:

From the question given above, the following data were obtained:

Mass of chromium (Cr) = 0.67 g

Mass of chromium sulfide = 1.2888 g

Empirical formula =?

Next, we shall determine the mass of sulphur (S) in the compound. This can be obtained as follow:

Mass of chromium (Cr) = 0.67 g

Mass of chromium sulfide = 1.2888 g

Mass of sulphur (S) =?

Mass of S = (Mass of chromium sulfide) – (Mass of Cr)

Mass of S = 1.2888 – 0.67

Mass of S = 0.6188 g

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Mass of Cr = 0.67 g

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