8. Life rafts and weather balloons can be inflated by the reaction shown below:CaH2 (s) + 2 HLO (1) Ca(OH)2 (aq) + 2 H2 (g)How many grams of CaH2 are needed to produce 10.0 L of hydrogen gas at 740 mmHgand 23°C?9. Nitroglycerin, an explosive compound, decomposes according to the equation below:4 C3HS(NO3)3 (s) 12 CO2 (g) + 10 H2O (g) + 6 N2 (g) + O2 (g)Calculate the total volume of gases produced at 1.2 atm and 26°C when 260 g ofnitroglycerine is decomposed.

Since, you have asked multiple questions. So I will solved first question for you. You can see the…

8. Life rafts and weather balloons can be inflated by the reaction shown below: CaH2 (s) +2 H2O (1) → Ca(OH)2 (aq) + 2 H2 (g) How many grams of CaH2 are needed to produce 10.0 L of hydrogen gas at 740 mmHg and 23°C?

8. Life rafts and weather balloons can be inflated by the reaction shown below: CaH2 (s) +2 H2O (1) → Ca(OH)2 (aq) + 2 H2 (g) How many grams of CaH2 are needed to produce 10.0 L of hydrogen gas at 740 mmHg and 23°C?

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter8: Gases

Section: Chapter Questions

Problem 95E: Methanol (CH3OH) can be produced by the following reaction: CO(g)+2H2(g)CH3OH(g) Hydrogen at STP...

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Concept explainers

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.

Question

8. Life rafts and weather balloons can be inflated by the reaction shown below:
CaH2 (s) + 2 HLO (1) Ca(OH)2 (aq) + 2 H2 (g)
How many grams of CaH2 are needed to produce 10.0 L of hydrogen gas at 740 mmHg
and 23°C?
9. Nitroglycerin, an explosive compound, decomposes according to the equation below:
4 C3HS(NO3)3 (s) 12 CO2 (g) + 10 H2O (g) + 6 N2 (g) + O2 (g)
Calculate the total volume of gases produced at 1.2 atm and 26°C when 260 g of
nitroglycerine is decomposed.

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94 Mining engineers often have to deal with gases when planning for the excavation of coal. Some of these gases, including methane, can be captured and used as fuel to support the mining operation. For a particular mine, 2.4 g of CH4 is present for every 100.0 g of coal that is extracted. If 45.6% of the methane can be captured and the daily production of the mine is 580 metric tons of coal, how many moles of methane could be obtained per day?
Methanol (CH3OH) can be produced by the following reaction: CO(g)+2H2(g)CH3OH(g) Hydrogen at STP flows into a reactor at a rate of 16.0 L/min. Carbon monoxide at STP flows into the reactor at a rate of 25.0 L/min. If 5.30 g methanol is produced per minute, what is the percent yield of the reaction?
A 1.0-L flask contains 10.0 g each of O2 and CO2 at 25 C. (a) Which gas has the greater partial pressure, O2 or CO2, or are they the same? (b) Which molecules have the greater rms speed, or are they the same? (c) Which molecules have the greater average kinetic energy, or are they the same?
The hydrocarbon octane (C8H18) bums to give CO2 and water vapor: 2 C8H18(g) + 25 O2(g) 16 CO2(g) + 18 H2O(g) If a 0.048-g sample of octane burns completely in O2, what will be the pressure of water vapor in a 4.75-L flask at 30.0 C? If the O2 gas needed for complete combustion was contained in a 4.75-L flask at 22 C, what would its pressure be?
105 The decomposition of mercury(II) thiocyanate produces an odd brown snake-like mass that is so unusual the process was once used in fireworks displays. There are actually several reactions that take place when the solid Hg(SCN)2 is ignited: 2Hg(SCN)2(s)2HgS(s)+CS2(s)+C3N4(s)CS2(s)+3O2(g)CO2(g)+2SO2(g)2C3N4(s)3(CN)2(g)+N2(g)HgS(s)+O2(g)Hg(l)+SO2(g) A 42.4-g sample of Hg(SCN)2 is placed into a 2.4-L vessel at 21°C. The vessel also contains air at a pressure of 758 torr. The container is sealed and the mixture is ignited, causing the reaction sequence above to occur. Once the reaction is complete, the container is cooled back to the original temperature of 21°C. (a) Without doing numerical calculations, predict whether the final pressure in the vessel will be greater than, less than, or equal to the initial pressure. Explain your answer. (b) Calculate the final pressure and compare your result with your prediction. (Assume that the mole fraction of O2 in air is 0.21.)
53 N2O5is an unstable gas that decomposes according to the following reaction: 2N2O5(g)4NO2(g)+O2(g) What would be the total pressure of gases present if a 10.0-L container 22.0 C begins with 0.400 atm of N2O5 and the gas completely decomposes?
You have a 550.-mL tank of gas with a pressure of 1.56 atm at 24 C. You thought the gas was pure carbon monoxide gas, CO, but you later found it was contaminated by small quantities of gaseous CO2 and O2. Analysis shows that the tank pressure is 1.34 atm (at 24 C) if the CO2 is removed. Another experiment shows that 0.0870 g of O2 can be removed chemically. What are the masses of CO and CO2 in the tank, and what is the partial pressure of each of the three gases at 25 C?
Butane, C4H10, is an easily liquefied gaseous fuel. Calculate the density of butane gas at 0.857 atm and 22C. Give the answer in grams per liter
Calcium carbide reacts with water to produce acetylene gas. C2H2. CaC2(s)+2H2O(l)Ca(OH)2(aq)+C2H2(g) Calculate the volume (in liters) of acetylene produced at 26C and 684 mmHg from 0.075 mol CaC2 and excess H2O.
60 Automakers are always investigating reactions for the generation of gas to inflate air bags, in part the because the sodium produced in the decomposition of NaN3 (see Problem 5.59) presents safety concerns. One system that has been considering is the oxidation of graphite by Strontium nitrate, as Sr(NO3)2as shown in the equation below: 5C(s)+2Sr(NO3)2(s)2SrO(s)+2N2(g)+5CO2(g) . Suppose that a System is being designed using this reaction and the goal is to generate enough gas to inflate a bag 61 L and 1.3 atm at 23 C. What is the minimum mass of graphite that should be used in the design of this system?
52 If tetraborane, B4H10, is treated with pure oxygen, it burns to give B2O3 and H2O: 2B4H10(s)+11O2(g)4B2O3(s)+10H2O(g) If a 0.050-g sample of tetraborane burns completely in O2, what will be the pressure of the gaseous water in a 4.25-L flask at 30.0 C?

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