A large ruby has a mass of 12.070 carats (1 carat = 200.0 mg). Rubies are...
A large ruby has a mass of 12.070 carats (1 carat = 200.0 mg). Rubies are made of a crystalline form of Al2O3.
A) What percentage of the mass of the ruby is aluminum?
B) How many atoms of aluminum are in this ruby?
C) The density of rubies is 4.02 g/cm3. What is the volume of the ruby?
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A large ruby has a mass of 12.070 carats (1 carat = 200.0 mg).
Rubies are...
1. What is the length in μm of an object with a length of 22.6 nm?...
1. What is the length in μm of an object with a length of 22.6 nm? 2. What volume of aluminum (in cm3) with a density of 2.70 g/cm3 is required to have 5.27 g of aluminum? 3. A block has a mass of 10.75 g and sides of length: 14.3 mm, 14.6 mm, 14.5 mm. What is its density in g/cm3? 4. What is the mass in kg of an object with a mass of 5472 mg?
5. Imagine that you have discovered a new way of making synthetic rubies by combining solid...
5. Imagine that you have discovered a new way of making synthetic rubies by combining solid aluminum and oxygen gas according to the reaction below. 4 Al+3 O2 + 2 Al2O3 a. If have 10 moles of Al, and an unlimited amount of Oz, how many moles of Al2O3 could you make? b. If have 10 moles of O2, and an unlimited amount of Al, how many moles of Al2O3 could you make? c. If you were to combine 10.0...
Aluminum (Al) has FCC unit cell geometry and lattice parameter 4.0 Å. a. How many complete...
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26) Diamond is a pure form of the element carbon. If a 2 carat diamond has a mass of \(0.39626\) ) g. how many carbon atoms are contained in this diamond?A) \(2.38 \times 10^{23}\) atomsB) \(1.99 \times 10^{23}\) atomsC) \(1.99 \times 10^{22}\) atomsD) \(3.97 \times 10^{22}\) atomsE) \(6.58 \times 10^{-25}\) atoms27) Dinitrogen monoxide, or laughing gas \(\left(\mathrm{N}_{2} \mathrm{O}\right)\), is used as a dental anesthetic and as an aerosol propellant. How many molecules of \(\mathrm{N}_{2} \mathrm{O}\) are present in a \(12.6...
Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a...
Common brass is a copper and zinc alloy containing 37.0% zinc by mass and having a density of 8.48 g/cm3. A fitting composed of common brass has a total volume of 126.5 cm3 . How many atoms of copper does the fitting contain? How many atoms of zinc does the fitting contain?
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1) Aluminum has a density of 2.699 g/cm3, and the radius of the aluminum atom is 143 pm. Verify that the metal crystalli...
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Zales Jeweller uses rubies and sapphires to produce two types of rings. A type 1 ring...
Zales Jeweller uses rubies and sapphires to produce two types of rings. A type 1 ring requires two rubies, three sapphires and one hour of jewller's labour time. A type 2 ring requires three rubies, two sapphires and two hours of jeweller's labour time. Each type 1 ring sells for R1200 and each type 2 ring sells for R1500. All rings produced by Zales can be sold. At present, Zales has 100 rubies, 120 sapphires and 70 hours of jeweller's...
all of 8 please. 8. An aluminum wire carrying a current of 5 A has a...
all of 8 please.
8. An aluminum wire carrying a current of 5 A has a cross sectional area of 4 x 10'6 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom). a) Recall the mass flow rate equation from semester 1. Rms Ro v b) Write the equivalent current relation for charges in a wire, I- c) What is the electrical analogy...
A cube of copper metal has a density of 8.96 g/cm3. The cube has a mass...
A cube of copper metal has a density of 8.96 g/cm3. The cube has a mass of 29.54 g. The atomic radius of a copper atom is 1.28 angstroms. How many atoms is the cube of copper metal?
5. Imagine that you have discovered a new way of making synthetic rubies by combining solid aluminum and oxygen gas according to the reaction below. 4 Al+3 O2 + 2 Al2O3 a. If have 10 moles of Al, and an unlimited amount of Oz, how many moles of Al2O3 could you make? b. If have 10 moles of O2, and an unlimited amount of Al, how many moles of Al2O3 could you make? c. If you were to combine 10.0...
26) Diamond is a pure form of the element carbon. If a 2 carat diamond has a mass of \(0.39626\) ) g. how many carbon atoms are contained in this diamond?A) \(2.38 \times 10^{23}\) atomsB) \(1.99 \times 10^{23}\) atomsC) \(1.99 \times 10^{22}\) atomsD) \(3.97 \times 10^{22}\) atomsE) \(6.58 \times 10^{-25}\) atoms27) Dinitrogen monoxide, or laughing gas \(\left(\mathrm{N}_{2} \mathrm{O}\right)\), is used as a dental anesthetic and as an aerosol propellant. How many molecules of \(\mathrm{N}_{2} \mathrm{O}\) are present in a \(12.6...
1) Aluminum has a density of 2.699 g/cm3, and the radius of the
aluminum atom is 143 pm. Verify that the metal crystallizes as a
face-centered cube.
EX. 3 Calculate the percentage of the total volume is occupied by spheres in (a) a simple cube, (b) a body-centered cube, and (c) a face-centered cube in which all atoms are identical. (b) A body-centered cube (bcc)
all of 8 please.
8. An aluminum wire carrying a current of 5 A has a cross sectional area of 4 x 10'6 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom). a) Recall the mass flow rate equation from semester 1. Rms Ro v b) Write the equivalent current relation for charges in a wire, I- c) What is the electrical analogy...
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