The mass of precious stones is expressed in terms of ‘carat’. Given that 1 carat = 3.168 grains and 1 gram = 15.4 grains, calculate the total mass of a ring in grams and kilograms which contains 0.500 carat diamond and 7.00 gram gold.
Weight of ring = 0.600 carat diamond + 8.500 g gold Now 1 carat = 3.168 grains Unit factor =3.168grains1carat=3.168grains1carat 1g = 15.4 grains Unit factor =1g15.4grains=1g15.4grains Weight of diamond = 0.600 carat −0.600carat×3.168grains1.caral×1gram15.4grains-0.600carat×3.168grains1.caral×1gram15.4grains =0.123 g Total mass of ring =8.500+0.123=8.623=8.500+0.123=8.623g
