Which increases the rate at which concrete forms?O Increasing pressureO Adding calcium nitrate or sodium nitrateODecreasing temperatureOcoarser grinding of solid ingredientsOAdding sugar or starch

Which increases the rate at which concrete forms? O Increasing pressure O Adding calcium nitrate or sodium nitrate Decreasing temperature O coarser grinding of solid ingredients O Adding sugar or starch

Which increases the rate at which concrete forms? O Increasing pressure O Adding calcium nitrate or sodium nitrate Decreasing temperature O coarser grinding of solid ingredients O Adding sugar or starch

General, Organic, and Biological Chemistry

7th Edition

ISBN:9781285853918

Author:H. Stephen Stoker

Publisher:H. Stephen Stoker

Chapter9: Chemical Reactions

Section: Chapter Questions

Problem 9.90EP: For the reaction C6H6(g)+3H2(g)C6H12(g)+heat determine in what direction the equilibrium will be...

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Identify the first chemical step in the production of Portland cement. How is this reaction related to the chemistry that takes place in the carbonation of concrete?
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12.102 A chemical engineer is working to optimize the production of acrylonitrile to be used in the manufacture of carbon fibers. The reaction being used is the combination of propene gas, ammonia, and oxygen. The reaction is normally carried out at moderately high temperatures so all species are in the gas phase. (a) Write the equilibrium constant expression for this reaction. (b) The boiling point of acrylonitrile is 77 °C, and that of propene is -48 °C. What would the equilibrium expression be if this reaction were carried out at room temperature? (c) What characteristic of this reaction might cause the engineer to desire carrying out this reaction at room temperature?
A gaseous material XY(g) dissociates to some extent to produce X(g) and Y(g): XY(g)X(g)+Y(g) A 2.00-g sample of XY (molar mass = 165 g/mol) is placed in a container with a movable piston at 25C. The pressure is held constant at 0.967 atm. As XY begins to dissociate, the piston moves until 35.0 mole percent of the original XY has dissociated and then remains at a constant position. Assuming ideal behavior, calculate the density of the gas in the container after the piston has stopped moving, and determine the value of K for this reaction of 25C.
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. Explain how the dissolving of an ionic solute in water represents an equilibrium process.
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