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Equilibrium : CalcRxnQuotient (13 Variations) In an experiment, 4.44 mol of SO_{2}, 7.93 mol of O_{2} and 4.03 mol of SO_{3} are placed in a 2.0L reaction vessel at a certain temperature. Calculate the reaction quotient, Q, for the reaction as written:

What is the calculated reaction quotient, Q? {2:NUMERICAL:=2.1e-1:1e-2#Correct! ~%50%2.1e-1:5e-2#Close but not quite right}

If K_{c} for this reaction at the temperature of the experiment is 3.7 x 10^{3}, will the reaction move toward the left or toward the right? {1:MULTICHOICE:left#Sorry, that's wrong.~=right#Correct!}

The Penny Experiment Revisited: An Illustration of Significant Figures, Accuracy, Precision, and Data AnalysisJoseph Bularzik In this general chemistry laboratory the densities of pennies are measured by weighing them and using two different methods to measure their volumes. The average and standard deviation calculated for the resulting densities demonstrate that one measurement method is more accurate while the other is more precise. Bularzik, Joseph. J. Chem. Educ.2007, 84, 1456.

Chemometrics |

Nomenclature / Units / Symbols |

Nonmajor Courses |

Physical Properties

Using a Graphing Calculator To Determine a First-Order Rate Constant: Author ReplyJosé E. Cortés-Figueroa When technology is used to help with mathematical calculations, the emphasis must be on the concepts being learned rather than simply the procedures. In our approach we are attempting to help students learn more about the concept and also to attain data analysis skills they will need in the future. Cortés-Figueroa, José E. J. Chem. Educ.2004, 81, 485.

Kinetics |

Chemometrics

Using a Graphing Calculator To Determine a First-Order Rate ConstantTodd P. Silverstein The authors use the graphing calculator to estimate the infinity reading from linearized kinetics data, and then they use linearized semi-log data to determine the first-order rate constant. Silverstein, Todd P. J. Chem. Educ.2004, 81, 485.

Handling Large and Small NumbersEd Vitz, John W. Moore A section of ChemPrime, the Chemical Educations Digital Library's free General Chemistry textbook.