CL1
Gold, one of the most sought-after metals in the world, has a
density of 19.3 g/cm', a melting point of 1064 °C, and a spe-
cific heat of 0.129 J/g °C. A gold nugget found in Alaska in
1998 weighed 20.17 lb. (2.4.2.6, 2.7.3.3.3.5)
Gold nuggets, also called
native gold, can be found in
streams and mines.
a. How many significant figures are in the measurement of
the weight of the nugget?
b. Which is the mass of the nugget in kilograms?
c. If the nugget were pure gold, what would its volume be in
cubic centimeters?
d. What is the melting point of gold in degrees Fahrenheit
and kelvins?
e. How many kilocalories are required to raise the tempera-
ture of the nugget from 500. °C to 1064 °C?
f. If the price of gold is $42.06 per gram, what is the nugget
worth in dollars?
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Ответ:
Answer and Explanation:deposition has been occurring on earth for a very long time. as time goes by, more deposits form layers on the earth, including the remains of animals and plants that would later become fossils, burying the previous deposits in another layer of newer deposits. therefore it follows that layers which are found deeper are older than those found in layers near the surface
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