Chemistry: The Molecular Science
5th Edition
ISBN: 9781285199047
Author: John W. Moore, Conrad L. Stanitski
Publisher: Cengage Learning
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Chapter 19, Problem 87QRT
Assume that the radius of Earth is 6400 km, the crust is 50. km thick, the density of the crust is 3.5 g/cm3, and 25.7% of the crust is silicon by mass. Calculate the total mass of silicon in the crust of Earth.
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A typical formulation for window glass is 75% SiO₂, 15% Na₂O, and 10.% CaO by mass. What masses of sand (SiO₂),sodium carbonate, and calcium carbonate must be combined toproduce 1.00 kg of glass after carbon dioxide is driven off bythermal decomposition of the carbonates?
The extraction of aluminum metal from the aluminum hydroxide found in bauxite by the Hall-Héroult process is one of the most remarkable success stories of 19th century chemistry, turning aluminum from a rare and precious metal into the cheap commodity it is today. In the first step, aluminum hydroxide reacts to form alumina
Al2O3
and water:
2Al(OH)3(s) + Al2O3(s) -> 3H2O(g)
In the second step, alumina
Al2O3
and carbon react to form aluminum and carbon dioxide:
2Al2O3(s) + 3C(s) + 4Al(s) -> 3CO2(g)
Suppose the yield of the first step is
74.%
and the yield of the second step is
76.%
. Calculate the mass of aluminum hydroxide required to make
4.0kg
of aluminum.
Be sure your answer has a unit symbol, if needed, and is rounded to the correct number of significant digits.
Most abundant metal on the surface of the earth:(a) Iron(b) Aluminium(c) Calcium(d) Sodium
Chapter 19 Solutions
Chemistry: The Molecular Science
Ch. 19.1 - Prob. 19.1ECh. 19.1 - Prob. 19.2ECh. 19.2 - Prob. 19.3CECh. 19.2 - Prob. 19.4CECh. 19.3 - Prob. 19.5ECh. 19.4 - Prob. 19.1PSPCh. 19.4 - Prob. 19.6ECh. 19.4 - Prob. 19.7ECh. 19.4 - Prob. 19.2PSPCh. 19.5 - Prob. 19.8CE
Ch. 19.5 - Prob. 19.9ECh. 19.5 - Prob. 19.3PSPCh. 19.5 - Use the terms oxidation, reduction, oxidizing...Ch. 19.5 - Prob. 19.11ECh. 19.6 - Prob. 19.13ECh. 19.6 - Prob. 19.14ECh. 19.6 - Prob. 19.15CECh. 19.6 - Prob. 19.16CECh. 19.6 - Prob. 19.4PSPCh. 19.6 - Prob. 19.5PSPCh. 19.6 - Prob. 19.17ECh. 19.6 - Prob. 19.6PSPCh. 19.6 - Prob. 19.7PSPCh. 19.6 - Prob. 19.8PSPCh. 19 - Prob. 1QRTCh. 19 - Prob. 2QRTCh. 19 - Prob. 3QRTCh. 19 - Prob. 4QRTCh. 19 - Prob. 5QRTCh. 19 - Prob. 6QRTCh. 19 - Prob. 7QRTCh. 19 - Prob. 8QRTCh. 19 - Prob. 9QRTCh. 19 - Prob. 10QRTCh. 19 - Prob. 11QRTCh. 19 - Prob. 12QRTCh. 19 - Prob. 13QRTCh. 19 - Prob. 14QRTCh. 19 - Prob. 15QRTCh. 19 - Prob. 16QRTCh. 19 - Prob. 17QRTCh. 19 - Prob. 18QRTCh. 19 - Prob. 19QRTCh. 19 - Prob. 20QRTCh. 19 - Prob. 21QRTCh. 19 - Prob. 22QRTCh. 19 - Prob. 23QRTCh. 19 - Prob. 24QRTCh. 19 - Prob. 25QRTCh. 19 - Prob. 26QRTCh. 19 - Identify the substance or substances produced by...Ch. 19 - Prob. 28QRTCh. 19 - Prob. 29QRTCh. 19 - Prob. 30QRTCh. 19 - Prob. 31QRTCh. 19 - Prob. 32QRTCh. 19 - Prob. 33QRTCh. 19 - Prob. 34QRTCh. 19 - Prob. 35QRTCh. 19 - Prob. 36QRTCh. 19 - Prob. 37QRTCh. 19 - Prob. 38QRTCh. 19 - Prob. 39QRTCh. 19 - Prob. 40QRTCh. 19 - Prob. 41QRTCh. 19 - Prob. 42QRTCh. 19 - A human body contains approximately 5 L of blood....Ch. 19 - Prob. 44QRTCh. 19 - Prob. 45QRTCh. 19 - Prob. 46QRTCh. 19 - Prob. 47QRTCh. 19 - Prob. 48QRTCh. 19 - Prob. 49QRTCh. 19 - Prob. 50QRTCh. 19 - Prob. 51QRTCh. 19 - Prob. 52QRTCh. 19 - Prob. 53QRTCh. 19 - Prob. 54QRTCh. 19 - Prob. 55QRTCh. 19 - Prob. 56QRTCh. 19 - Prob. 57QRTCh. 19 - Prob. 58QRTCh. 19 - Prob. 59QRTCh. 19 - Prob. 60QRTCh. 19 - Prob. 61QRTCh. 19 - Prob. 62QRTCh. 19 - Prob. 63QRTCh. 19 - Prob. 64QRTCh. 19 - Prob. 65QRTCh. 19 - Prob. 66QRTCh. 19 - Prob. 67QRTCh. 19 - Prob. 68QRTCh. 19 - Prob. 69QRTCh. 19 - Prob. 70QRTCh. 19 - Prob. 71QRTCh. 19 - Prob. 72QRTCh. 19 - Prob. 73QRTCh. 19 - Prob. 74QRTCh. 19 - Use the phase diagram for sulfur for Question 75....Ch. 19 - Prob. 76QRTCh. 19 - Prob. 77QRTCh. 19 - Prob. 78QRTCh. 19 - Prob. 79QRTCh. 19 - Prob. 80QRTCh. 19 - A natural brine found in Arkansas has a bromide...Ch. 19 - Prob. 82QRTCh. 19 - Prob. 83QRTCh. 19 - Prob. 84QRTCh. 19 - At 20. C the vapor pressure of white phosphorus is...Ch. 19 - Prob. 86QRTCh. 19 - Assume that the radius of Earth is 6400 km, the...Ch. 19 - Prob. 88QRTCh. 19 - Prob. 89QRTCh. 19 - Prob. 90QRTCh. 19 - Prob. 91QRTCh. 19 - Prob. 92QRTCh. 19 - Prob. 93QRTCh. 19 - Prob. 94QRTCh. 19 - Prob. 95QRTCh. 19 - Use a Born-Haber cycle (Sec. 5-13) to calculate...Ch. 19 - Prob. 97QRTCh. 19 - Elemental analysis of a borane indicates this...Ch. 19 - Prob. 99QRTCh. 19 - Prob. 100QRT
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- 4.48 Elemental phosphorous is used in the semiconductor industry. It can be obtained from an ore called fluoroapatite via reaction with SiO2 and C: 4Ca5( PO4)3F+18SiO2+30C3P4+30CO+18CaSiO3+2CaF2 Suppose a particular semiconductor production plant requires 1500 kg of P4. If the recovery of P4 from this reaction is 73% efficient, what mass of fluoroapatite is needed?arrow_forwardPhosphorous acid, H3PO3, is oxidized to phosphoric acid, H3PO4, by nitric acid, which is reduced to nitrogen monoxide, NO. Write the balanced equation for this reaction.arrow_forwardAluminum is produced commercially by the electrolysis of Al2O3 in the presence of a molten salt. If a plant has a continuous capacity of 1.00 million A, what mass of aluminum can be produced in 2.00 h?arrow_forward
- Complete and balance the equations of the following reactions, each of which could be used to remove hydrogen sulfide from natural gas: (a) Ca(OH)2(s)+H2S(g) (b) Na2CO3(aq)+H2S(g)arrow_forwardPhosphorus occurs naturally in the form of fluorapatite, CaF2 3Ca3(PO4)2. The dot indicates 1 part CaF2 to 3 parts Ca3(PO4)2. This mineral is reacted with an aqueous solution of H2SO4 in the preparation of a fertilizer. The products are phosphoric acid, hydrogen fluoride, and gypsum, CaSO4 2H2O. Write the balanced equation describing this process.arrow_forward4.25 When octane is combusted with inadequate oxygen, carbon monoxide may form. If 100 g of octane is burned in 200 g of O2, are conditions conductive to forming carbon monoxide?arrow_forward
- Describe how ultrapure silicon can be produced from sand.arrow_forwardWhen calcium carbonate is heated strongly, it evolves carbon dioxide gas. CaCO3(s)CaO(s)+CO2(g) 25 g of CaCO3 is heated, what mass of CO2would be produced? What volume would this quantity of CO2 (CU at STP?arrow_forwardMany cereals are made with high moisture content so that the cereal can be formed into various shapes before it is dried. A cereal product containing 58% H2O by mass is produced at the rate of 1000. kg/h. What mass of water must be evaporated per hour if the final product contains only 20.% water?arrow_forward
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