The mass of a precious stone is specified in carat (1 carat = 3.168 grains; 1g= 15.4 grains). The total mass of a ring containing 6.0 g gold and 0.6 carat diamond is :

# The mass of a precious stone is specified in carat ($1$ carat  grains;  grains). The total mass of a ring containing $6.0$ g gold and $0.6$ carat diamond is :

1. A

2. B

3. C

4. D

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### Solution:

Mass of gold

Mass of diamond

Total mass of ring

$=6.1234\mathrm{g}\approx 6.1\mathrm{g}=6.1×{10}^{-3}\mathrm{kg}.$

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