A Solution Is Prepared by Dissolving 16

question 119

Multiple Choice

A solution is prepared by dissolving 16.2 g of benzene (C₆H₆) in 282 g of carbon tetrachloride (CCl₄) .The concentration of benzene in this solution is ________ molal.The molar masses of C₆H₆ and CCl₄ are 78.1 g/mol and 154 g/mol,respectively.

• A)7.36 × 10^-4
• B)0.736
• C)0.102
• D)0.0543
• E)5.43

Understand the concepts of biofilms and their significance.

Identify the evolutionary relationships among different groups of microorganisms.

Grasp the basic mechanisms of energy acquisition and metabolism in prokaryotes.

Comprehend the environmental roles of microorganisms, including their roles in nutrient cycling.

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Definitions:

Central Tendency

A measure that represents the center or typical value of a dataset, commonly identified through the mean, median, or mode.

Standard Deviation

A measure that describes the amount of variation or dispersion of a set of values from the mean, indicating the spread or variability of the data.

Mean

Calculated by dividing the total of the numbers by their quantity, the average represents the mean value of a set.

Median

The middle value in an ordered list of numbers, effectively dividing the dataset into two halves.