How Many Grams of Ethanol (Density 0

question 40

Multiple Choice

How many grams of ethanol (density 0.80 g/cm³) should be added to 5.0 g of chloroform (density 1.5 g/cm³) if the resulting mixture is to have a density of 1.2 g/cm³? Assume that the fluids do not change their volumes when they are mixed.

• A)2.0 g
• B)2.4 g
• C)1.8 g
• D)4.4 g
• E)1.6 g

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Definitions:

Probability Sampling

A sampling method in which every member of the population has a known, non-zero chance of being selected, ensuring representativeness and allowing for the calculation of sampling error.

Systematic Sampling

A probability sampling method in which we randomly select one of the first k elements and then select every kth element thereafter.

Sample Proportion

The fraction of the sample that represents a particular outcome or characteristic.

Dormitories

Residential buildings on educational campuses where students live during academic terms.