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Gold, one of the most sought-after metals in the world,
Chapter 2, Problem 1CI(choose chapter or problem)
Gold, one of the most sought-after metals in the world, has a density of \(19.3 \mathrm{~g} / \mathrm{cm}^{3}\), a melting point of \(1064^{\circ} \mathrm{C}\), and a specific heat of \(0.129 \mathrm{~J} / \mathrm{g}^{\circ} \mathrm{C}\). A gold nugget found in Alaska in 1998 weighs \(20.17 \mathrm{lb}\).
a. How many significant figures are in the measurement of weight of the nugget?
b. What is the mass of the nugget in kilograms?
c. If the nugget were pure gold, what would its volume be in \(\mathrm{cm}^{3}\)?
d. What is the melting point of gold in degrees Fahrenheit and kelvins?
e. How many kilojoules are required to heat the nugget from \(27^{\circ} \mathrm{C}\) to \(358^{\circ} \mathrm{C} ?\) How many kilocalories is that?
f. In 2010 , the price of gold was $61.08 per gram. What was the nugget worth, in dollars, in 2010 ? Gold nuggets, also called native gold, can be found in streams and mines.
Questions & Answers
QUESTION:
Gold, one of the most sought-after metals in the world, has a density of \(19.3 \mathrm{~g} / \mathrm{cm}^{3}\), a melting point of \(1064^{\circ} \mathrm{C}\), and a specific heat of \(0.129 \mathrm{~J} / \mathrm{g}^{\circ} \mathrm{C}\). A gold nugget found in Alaska in 1998 weighs \(20.17 \mathrm{lb}\).
a. How many significant figures are in the measurement of weight of the nugget?
b. What is the mass of the nugget in kilograms?
c. If the nugget were pure gold, what would its volume be in \(\mathrm{cm}^{3}\)?
d. What is the melting point of gold in degrees Fahrenheit and kelvins?
e. How many kilojoules are required to heat the nugget from \(27^{\circ} \mathrm{C}\) to \(358^{\circ} \mathrm{C} ?\) How many kilocalories is that?
f. In 2010 , the price of gold was $61.08 per gram. What was the nugget worth, in dollars, in 2010 ? Gold nuggets, also called native gold, can be found in streams and mines.
ANSWER:
Step 1 of 6
a. Here we have to find out how many significant figures are in the measurement of weight of the nugget.
In this question it has been given that the weight of the gold nugget is 20.17 lb.
As it is known that all the non zero digits are significant and a zero present in between two nonzero digits is also significant.
Thus the weight 20.17 lb has four significant figures.