You Dissolve a 1

question 73

Multiple Choice

You dissolve a 1.28-g sample of NaCl in a total volume of 125.0 mL of solution. Your lab partner has 1.50 M aqueous NaCl and wants to make a solution with the same concentration and volume as yours. How much of the solution does your lab partner need to use?

• A) 1.83 mL
• B) 14.6 mL
• C) 125 mL
• D) 107 mL
• E) none of these

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Definitions:

Precambrian

denotes the vast period of time before the Cambrian period, covering the formation of the Earth until about 541 million years ago.

Paleozoic

An era of geological time from about 541 to 252 million years ago, marked by the development of early life forms to the advent of reptiles and the end of the Permian period.

Mesozoic

An era of geological time from about 252 to 66 million years ago, known as the "Age of Reptiles" and marked by the dominance of dinosaurs.

Cenozoic

The most recent of the three major subdivisions of animal and plant life geologic time, covering the period from 66 million years ago to the present.