OER.GroupQuiz1.v2.docx

# OER.GroupQuiz1.v2.docx - Group Quiz#1 name(partners names...

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Group Quiz #1 __________________ name _______________, _______________, _______________,_______________ (partners names) Rules / Guidelines All students must show complete work and answers The instructor will grade all quizzes individually. Students should work together / compare answers. I will answer questions and let you know if an answer is incorrect. Always round answers to the correct number of significant figures. 1. Report each calculation to the proper number of significant figures. a. 45.03 0.028 = b. (354.5 + 12.5) * 0.001895 = c. (137.16 – 136.56) * 0.0583 = 2. Copper has a density of 8.94g/cm 3 . A company that manufactures electrical wires has a block of copper weighing 55lbs. If this is drawn into wire that has a diameter of 0.080cm, then what length (in meters) of wire could be made? A wire is a very long cylinder with a volume equal to r 2 l. 3. Give names for each of the following compounds. a. Zn 3 (PO 4 ) 2 b. NO 2 c. VBr 3 d. SnSO 3

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4. What is the mass percentage of nitrogen in the compound ammonium dichromate? 5. Determine the quantity in each of the following.
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• Fall '09
• Exam #1

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