11 Grade Chemistry
mareegirls
aaiiiw8_13.docxName: _________ Date: ______
Authentic Assessment III (Weeks 8-13)
Chemistry: Stoichiometry
Directions: Message your teacher for your hydrocarbon compound to complete this assignment after you have completed Weeks 8-13. Then use your compound to answer the questions below.
Your compound is ______ Magnesium Phosphorus
Use your knowledge, notes and lesson pages if you need them, to answer all 5 regular questions. You may answer the bonus question for extra credit.
You do not get a second chance to make corrections so do your best on the first try. When you have completed this worksheet and double-checked your answers, save it to your Chemistry folder, and send it to your teacher using the Weeks 8-13 Assessment drop box.
Your set-up of each problem is the most important part of each answer, without the set-up, you will not receive full credit for the answer.
1. What is the molar mass of your hydrocarbon compound? Show your work to set up the problem as well as the answer.
2. How many atoms are in 5 moles of your hydrocarbon? Show the set-up and answer.
3. What are the products of the combustion reaction of your hydrocarbon compound? (Hint: Look in Week 12 Types of Reactions and review combustion equations).
4. Write the balanced Combustion Equation (from the reaction in question 3).
5. How many moles of CO2 are produced when 2 moles of your hydrocarbon are burned?
6. Bonus Question: How many grams of oxygen gas are needed to produce 10.0 grams of carbon dioxide according to your balanced equation?
