A Sample of 0

question 15

Multiple Choice

A sample of 0.200 moles of NO and 0.300 moles of Cl₂ are placed in a 1.00 liter vessel at 400 K. The reaction 2 NO + Cl₂→2 NOCl occurs and after 5 seconds measurements show that the [Cl₂] has decreased to 0.290 M . Calculate D [NOCl]/ D t for this time interval, in units of mol/L × s.

• A) 0.0040
• B) - 0.0020
• C) 0.0010
• D) 0.0020
• E) - 0.0040

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Definitions:

Confidence Interval

A range of values, derived from sample data, that is likely to contain the value of an unknown population parameter with a certain level of confidence.

Critical Value

A mark on the test statistic's scale that, when surpassed, results in the null hypothesis being rejected.

Null Hypothesis

A hypothesis that assumes no significant difference or effect in an experimental setup, used as a default until evidence indicates otherwise.

Hypothesis Testing

A method of statistical inference used to decide whether a hypothesis about a parameter in a population is likely to be true.