Please help i really need it thanks
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Please help i really need it thanks

[From: ] [author: ] [Date: 11-07-08] [Hit: ]
54cm,1 in3 = (2.54^3) cm3 = 16.387 cm3,1 kg = 2.2 lbs,......
Hi, every one , i am having exam tommorow and i have no idea to do this problem our teacher told us we will have a lot of problems similar to this one so please help me. if you can .
Aprecious diamond (density of 4.51g/cm3) is 108 carats one carat has a mass of 200 mg
A- what is the mass in pound
B-what itis valume in cubic inches?

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Ok, most important thing to know here,
mass = density*volume,
1 in = 2.54cm,
1 in3 = (2.54^3) cm3 = 16.387 cm3,
1 kg = 2.2 lbs,
1 kg = 1000g = 1000,000 mg.
1 in3 = (2.54^3) cm3 = 16.387 cm3

A = 108 carats * 200mg/carat = 21600 mg = 0.021600 kg
0.0216 kg * 2.2 lbs/kg = 0.04752 lbs.


B = 21600 g = 21.6 g
21.6g / (4.51g/cm3) = 4.789 cm3

4.789 cm3 * (1 in3 / 16.387 cm3) = 0.2922 in3
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