HardChemistryHigh School (9–10)GeneralMetals and Non-metals › Properties of Metals and Non-metalsNumericalBoard Exam
A bronze bell is 92 % copper and 8 % tin…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A bronze bell is copper and tin.
- How much tin is in of this bronze?
- How much pure copper must be melted into of it to make a bronze that is copper?
Need a reminder? The key ideaShow
An alloy is a mixture of a metal with other elements, melted together. Brass: copper and zinc. Bronze: copper and tin. Solder: lead and tin. Stainless steel: iron, chromium and nickel. Pure gold is carat; carat gold is gold. Mass of a part = total mass × its percentage ÷ .
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) of tin.
Step 2. (b) Copper now: . So .
Step 3. , so .
Check. .
Answer: (a) . (b) of copper, doubling the mass.
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