A Chemist Carries Out This Reaction in the Laboratory Using $\rightarrow$

question 26

Multiple Choice

A chemist carries out this reaction in the laboratory using 4.31 grams of zinc and an excess of sulfur: Zn + S $\rightarrow$ ZnS
From the balanced equation,she calculates that she should obtain 6.41 grams of zinc sulfide.However,she isolates only 5.01 grams of product.What is her percent yield for this reaction?

• A) 67.2%
• B) 86.0%
• C) 78.2%
• D) 128%

Understand the contributions of both hemispheres of the brain to cognitive and emotional functions.

Acknowledge the impact of physical play and activities on child development.

Learn about the role of myelination in child development.

Understand the factors influencing handedness and artistic development in early childhood.

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Definitions:

Behavior Modification

A therapeutic approach that seeks to change potentially self-destructive or unhealthy behaviors through the systematic application of the principles of conditioning.

Continuous Reinforcement

A learning schedule in which every correct response is followed by a reward, facilitating rapid learning.

Insight Learning

A sudden understanding of how to solve a problem after a period of either inaction or thinking about the problem.

Shaping

A method in behavioral psychology where successive approximations of a desired behavior are reinforced until the exact behavior is achieved.