Question

A sterling silver necklace (an alloy 92.5% by weight of silver and copper) weighed in the...

A sterling silver necklace (an alloy 92.5% by weight of silver and copper) weighed in the air at 20 ° C: 105,000 g.
Calculate
1) The weight of the necklace when it is submerged in water
2) The percentage by volume of copper if the volumes are additive. Densities at 20 ° C, g / ml
copper 8,960
10,500 silver
water 0.9982

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