A 100ML Sample of 0 $\rarr$ NH₄Cl(aq)
the Temperature Increase Is 2

question 40

Multiple Choice

A 100.mL sample of 0.200 M aqueous hydrochloric acid is added to 100.mL of 0.200 M aqueous ammonia in a calorimeter whose heat capacity (excluding any water) is 480.J/K. The following reaction occurs when the two solutions are mixed. HCl(aq) + NH₃(aq) $\rarr$ NH₄Cl(aq)
The temperature increase is 2.34°C. Calculate $\Delta$ H per mole of HCl and NH₃ reacted.

• A)154 kJ/mol
• B)1.96 kJ/mol
• C)485 kJ/mol
• D)-1.96 kJ/mol
• E)-154 kJ/mol

Calculate the value of A for specific confidence levels using sample size.

Determine the margin of error for population mean estimates from samples.

Recognize how sample size affects the margin of error in confidence intervals.

Identify the appropriate t-score for constructing confidence intervals of various confidence levels and sample sizes.

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