Solve the Problem. -A Chemist Needs 140 Milliliters of a 70% Solution but 70

question 32

Multiple Choice

Solve the problem.
-A chemist needs 140 milliliters of a 70% solution but has only 66% and 94% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.

• A)123 ml of 66%; 17 ml of 94%
• B)20 ml of 66%; 120 ml of 94%
• C)120 ml of 66%; 20 ml of 94%
• D)17 ml of 66%; 123 ml of 94%

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Definitions:

Stressor

A chemical or biological agent, environmental condition, external stimulus, or an event that causes stress to an organism.

Problem-focused Coping

A coping strategy that involves directly tackling a stressful situation by finding solutions to resolve the underlying problem.

Mindfulness Meditation

A practice of focused attention and awareness to achieve mental clarity and emotional calmness.

Biofeedback

A technique that trains people to improve their health by using signals from their own bodies to control bodily processes that normally occur involuntarily, such as heart rate.