A 100-ML Sample of 0

question 50

Multiple Choice

A 100.-mL sample of 0.10 M HCl is mixed with 50. mL of 0.10 M NH₃. What is the resulting pH? (K_b for NH₃ = 1.8  10^-5)

• A) 7.85
• B) 1.30
• C) 3.87
• D) 1.48
• E) 12.52

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Definitions:

Confidence Interval

A range of values that is used to estimate the true value of a population parameter with a certain level of confidence.

Independent Random Samples

Samples selected from a population in such a way that each individual sample is chosen randomly and independently from one another.

Confidence Interval

A span of numerical data obtained from sampling statistics that is expected to enclose an uncertain population parameter within a given confidence level.

Mean Calories

The average amount of energy contained in a food item or diet, typically measured in calories.