Substance Reaction to flame Phase at room temperature Reaction with water Hydrogen Colorless Gas None Explodes Bubbling and reaction is hot. Potassium Burns and is likely to explode Silver Solid Sulfur Yellow Solid None Burns slowly and turns a color Strontium chloride White Crystalline Solid Dissolves Melts Which substance and explanation proves that no chemical change took place? O A Hydrogen because it did not react with water and will explode when exposed to a flame. O B. Potassium because it bubbles in water and will explode when exposed to a flame ondernin-

Substance Reaction to flame Phase at room temperature Reaction with water Hydrogen Colorless Gas None Explodes Bubbling and reaction is hot. Potassium Burns and is likely to explode Silver Solid Sulfur Yellow Solid None Burns slowly and turns a color Strontium chloride White Crystalline Solid Dissolves Melts Which substance and explanation proves that no chemical change took place? O A Hydrogen because it did not react with water and will explode when exposed to a flame. O B. Potassium because it bubbles in water and will explode when exposed to a flame ondernin-

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter8: Molecules And Materials

Section: Chapter Questions

Problem 8.88PAE

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Similar questions

he following demonstration takes place in a two-step process: rst, solid calcium carbide (CaC2j)reacts with liquid water to produce acetylene gas (C2H2)and aqueous calcium hydroxide. Second the acetylene gas produced is then ignited with a match, causing the combustion reaction of acetylene with oxygen gas to produce gaseous carbon dioxide and gaseous water. Write the balanced equations for each reaction that is occurring, including all phases. If a 100.0gsample of calcium carbide (CaC2)is initially reacted with 50.0gof water, which reactant is limiting? Now imagine that the final gases produced are collected in a large bulkier and allowed to cool to room temperature. Using the information from part b ( l00.0gof Cec2reacting with 50.0gof H2O), how many liters of carbon dioxide gas were produced in the balloon at a pressure of 1.00atm and 25C?
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Boron nitride (BN) exists in two forms. The first is a slippery solid formed from the reaction of BCl3 with NH3, followed by heating in an ammonia atmosphere at 750C. Subjecting the first form of BN to a pressure of 85,000 atm at 1800C produces a second form that is the second hardest substance known. Both forms of BN remain solids to 3000C. Suggest structures for the two forms of BN.
Explain why the enthalpies of vaporization of the following substances increase in the order CH4NH3H2O, even though all three substances have approximately the same molar mass.
Which of the following substances can be liquefied by applying pressure at 25C? For those that cannot, describe the conditions under which they can be liquefied. Substance Critical Temperature Critical Pressure Sulfur dioxide, SO2 158C 78 atm Acetylene, C2H2 36C 62 atm Methane. CH4 82C 46 atm Carbon monoxide, CO 140C 35 atm
A special vessel (see Fig. 10.45) contains ice and supercooled water (both at 10C) connected by vapor space. Describe what happens to the amounts of ice and water as time passes.
Butane is a gas at room temperature; however, if you look closely at a butane lighter you see it contains liquid butane. Explain how it is possible to have liquid butane present.