Mass.gov
Massachusetts Department of Elementary and Secondary Education
Go to Selected Program Area
Massachusetts State Seal
News School/District Profiles School/District Administration Educator Services Assessment/Accountability Family & Community  
 Student Assessment  Accountability, Partnership, & Assistance  Compliance/Monitoring >  
>
>
>
 
 
 
 
 
 
 
 
 
 
 
>
>
>
>
>
>
>
>
>
>
>

Massachusetts Comprehensive Assessment System

2012, High School Chemistry

  Question 45: Open-Response  
Glucose (C6H12O6) is formed in plants by the process of photosynthesis. The net equation for photosynthesis is shown below.
Six C O two plus six H two O in the presence of sunlight forms C six H twelve O six plus six O two
  1. Calculate the molar mass of glucose. Show your calculations and include units in your answer.
  2. Explain how the amount of carbon dioxide consumed by a plant can be determined from measuring the amount of oxygen released by the plant. Assume excess water is available.
  3. Calculate the amount of glucose, in grams, formed when 100 mol of O2 is released. Show your calculations and include units in your answer.

Scoring Guide and Sample Student Work
Select a score point in the table below to view the sample student response.

ScoreDescription
4 The response demonstrates a thorough understanding of the mole concept and determining the molar mass of compounds. The response correctly calculates the molar mass of glucose and clearly explains how the amount of carbon dioxide consumed by the plant can be determined by measuring the amount of oxygen released by the plant. The response also correctly calculates the amount of glucose produced when a given amount of oxygen is released.
4
3 The response demonstrates a general understanding of the mole concept and determining the molar mass of compounds.
2 The response demonstrates a limited understanding of the mole concept and determining the molar mass of compounds.
1 The response demonstrates a minimal understanding of the mole concept and determining the molar mass of compounds.
0 The response is incorrect or contains some correct work that is irrelevant to the skill or concept being measured.

Note: There are 2 sample student responses for Score Point 4.

High School Chemistry

Question 11: Solutions, Equilibrium, and Acid-Base Theory
Question 23: Properties of Matter and Thermochemistry
Question 33: Bonding and Reactions
Question 44: Atomic Structure and Periodicity
Question 45: Bonding and Reactions

Return to the MCAS 2012 Student Work Directory



Last Updated: Jun 30, 2016
E-mail this page| Print View| Print Pdf  
Massachusetts Department of Elementary and Secondary Education Search · Site Index · Policies · Site Info · Contact ESE