## Question

The mass of precious stones is expressed in terms of ‘carat’. Given that 1 caret = 3.168 grains and 1 grams = 15.4 grains, calculate the total mass of a ring in grams and kilograms which contains 0.500 carat diamond and 7.00 grams gold.

### Solution

0.0071 kg

The unit conversion factors to be used will be

= 0.10 gram

.

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