A Solution Is Prepared by Dissolving 49

question 20

Multiple Choice

A solution is prepared by dissolving 49.3 g of KBr in enough water to form 473 mL of solution.Calculate the mass % of KBr in the solution if the density is 1.12 g/mL.

• A)10.4%
• B)8.57%
• C)10.1%
• D)11.7%
• E)9.31%

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Definitions:

Motivation

The process that initiates, guides, and maintains goal-oriented behaviors, driven by the needs, desires, and interests of the individual.

Distress

Negative stress that can result from challenging situations, leading to physical and psychological discomfort.

Empathy

Ability to feel another person’s experiences; identifying with and experiencing another person’s emotions, thoughts and attitudes.

Bystander-Calculus Model

A theoretical framework suggesting that individuals go through a cognitive evaluation process in deciding whether to help in an emergency, considering costs and benefits.