Question
(d) Gold is often alloyed with other metals when it is used to make jewellery. The proporti onofgoldinapieceof gold jewelleryismeasuredinc arats. Pure gold is 24 carats. A 9 carat gold ring has a mass of 12 g. Calculate the mass of gold in this ring.
Answer
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Aiden
Veteran · Tutor for 11 years
Answer
Explanation
This is a proportions problem from mathematics. First of all, it's important to understand what "carat" means in this context. Here, "carat" is a unit of measurement used to quantify the amount of gold in the ring. Pure gold is 24 carats. Thus, in a 9-carat golden ring, the proportion of gold can be found by the fraction of 9 carats out of a total 24 (which signifies pure gold). After having calculated the proportion of gold, you then need to find this percentage of the total mass of the ring, which is given to be 12 grams.