- Username
- Password
forgot?

iRubric: Stoichiometry rubric

(draft) edit print share Copy to my rubrics Bookmark test run assess... delete Do more...
Stoichiometry Stoichiometry In this assignment you are asked to use your knowledge to determine the number of grams of carbon dioxide produced in the combustion reaction of 234 g of ethane gas. Rubric Code: TX822C7 By rockiopi Draft Public Rubric Subject: Chemistry Type: Homework Grade Levels: Undergraduate

Stoichiometry Enter rubric description
	Poor 0 pts	Fair 1.5 pts	Good 3 pts
Balancing equations	Poor You are able to include most of the reactants and products of the combustion reaction, but cannot balance it.	Fair You are able to write the reaction, but not balance it.	Good You are able to write the reaction and balance it.
Molar mass Enter criteria description	Poor You are unable to identify that the molar mass of ethane is dependent on the atomic masses of its elements, and unable to find the molar mass.	Fair You are able to identify that the molar mass of ethane is dependent on the atomic masses of its elements, but unable to find the molar mass.	Good You are able to identify that the molar mass of ethane is dependent on the atomic masses of its elements, and able to add them together to find the molar mass.
Using molar conversion factors Enter criteria description	Poor You are able to take the mass in grams of ethane and divide it by the molar mass to find moles. You are unable to use the molar ratios from the reaction to find the moles of carbon dioxide. You are unable to use the molar mass of carbon dioxide to convert it to grams of carbon dioxide.	Fair You are able to take the mass in grams of ethane and divide it by the molar mass to find moles. You are able to use the molar ratios from the reaction to find the moles of carbon dioxide. You are unable to use the molar mass of carbon dioxide to convert it to grams of carbon dioxide.	Good You are able to take the mass in grams of ethane and divide it by the molar mass to find moles. You are able to use the molar ratios from the reaction to find the moles of carbon dioxide. You are able to use the molar mass of carbon dioxide to convert it to grams of carbon dioxide.