Gold is alloyed (mixed) with other metals to increase itshardness in making jewelry. (a) Consider a piece of gold jewelrythat weighs 9.85 g and has a volume of 0.675 cm3. Thejewelry contains only gold and silver, which have densitiesof 19.3 and 10.5 g>cm3, respectively. If the total volume ofthe jewelry is the sum of the volumes of the gold and silverthat it contains, calculate the percentage of gold (by mass)in the jewelry(b) The relative amount of gold in an alloy iscommonly expressed in units of carats. Pure gold is 24 carat,and the percentage of gold in an alloy is given as a percentageof this value. For example, an alloy that is 50% gold is12 carat. State the purity of the gold jewelry in carats.
Gold is alloyed (mixed) with other metals to increase its
hardness in making jewelry. (a) Consider a piece of gold jewelry
that weighs 9.85 g and has a volume of 0.675 cm3. The
jewelry contains only gold and silver, which have densities
of 19.3 and 10.5 g>cm3, respectively. If the total volume of
the jewelry is the sum of the volumes of the gold and silver
that it contains, calculate the percentage of gold (by mass)
in the jewelry(b) The relative amount of gold in an alloy is
commonly expressed in units of carats. Pure gold is 24 carat,
and the percentage of gold in an alloy is given as a percentage
of this value. For example, an alloy that is 50% gold is
12 carat. State the purity of the gold jewelry in carats.
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