MIDTERM+2+Form+A+Key - Midterm 2 Exam Form A, CHEM 001 Fall...

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Midterm 2 Exam Form A, CHEM 001 Fall 2010. (Chapters 7 through 11) Name: ______________________ Date: ____________ Please be sure the chemical equations given in the questions below are balanced before you attempt to answer the respective questions. 1. What is the molecular weight of ethanol, CH 3 CH 2 OH? a) 26.06 g/mol b) 45.05 g/mol c) 46.08 g/mol d) 32.00 g/mol 2. What is the % composition of carbon in ethanol, CH 3 CH 2 OH? a) 52.13 % b) 34.72 % c) 26.06 % d) 13.15 % 3. An unknown compound was analyzed and found to contain 3.99 % P, 82.3 % Br and 13.7% Cl. What is the empirical formula of the compound? a) PBr 4 Cl 3 b) PBr 2 Cl c) P 2 Br 8 Cl 3 d) PBr 8 Cl 3 4. The electron configuration 1s 2 2s 2 2p 6 3s 2 3p 3 belongs to which element listed below? a) N b) P c) C d) As 5. The sequence of coefficients for the balanced equation is … H 3 PO 4 + CaCO 3 Ca 3 (PO 4 ) 2 + CO 2 + H 2 O a) 2, 3, 1, 3, 2 b) 3, 1, 3, 2, 3 c) 2, 2, 1, 2, 3 d) 2, 3, 1, 3, 3 6. If 45.4 g of H 2 O are produced in the reaction given below, the number of grams of
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This note was uploaded on 06/30/2011 for the course CHEM 1A taught by Professor Kim during the Spring '11 term at San Joaquin Delta College.

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MIDTERM+2+Form+A+Key - Midterm 2 Exam Form A, CHEM 001 Fall...

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