Solve the Problem. -A Chemist Needs 9 Liters of a 50% Salt Solution

question 113

Multiple Choice

Solve the problem.
-A chemist needs 9 liters of a 50% salt solution. All she has available is a 20% salt solution and a 70% salt solution. How much of each of the two solutions should she mix to obtain her desired solution?

• A)4.5 L of 20%; 4.5 L of 70%
• B)3.6 L of 20% ; 5.4 L of 70%
• C)1.8 L of 20%; 7.2 L of 70%
• D)2.7 L of 20%; 6.3 L of 70%

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Definitions:

Peripheral Nervous System

The part of the nervous system that consists of nerves and ganglia outside of the brain and spinal cord, connecting the central nervous system to limbs and organs.

Reticular Formation

A network of nerve pathways located in the brainstem that mediates the overall level of consciousness.

Alertness

The state of being watchful and ready to respond quickly to any changes or threats.

Emotions

Complex psychological states that involve a subjective experience, a physiological response, and a behavioral or expressive response.