Exam 1 Spring 2010

A c nan3 b 17 ch3oh cucn d mgcl2 what is the mass

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Unformatted text preview: ne atom of argon? A. B. 18. 39.95 g/atom 6.634 10–23 g/atom C. 74.92 g/atom D. 1.244 10–22 g/atom What is the mass, in grams, of sodium in 241 g of sodium sulfate? A. 78.1 g C. 21.3 g B. 96.6g D. 0.0664 g 19. How many oxygen atoms are in 129 g of Na3C6H5O7? (Molar mass of Na3C6H5O7 = 258 g/mol) A. B. 20. 3.01 C. 1023 atoms 5.05 1024 atoms D. 3.50 atoms 2.11 1024 atoms Mesitylene is an organic compound that contains only carbon and hydrogen. What is the empirical formula of mesitylene if it contains 90.0% carbon by mass? A. C. C6H8 B. 21. C3H4 CH3 D. C2H3 What is the coefficient of H2O when the following chemical equation is balanced with the smallest integer coefficients? NaOH (aq) + H2SO3 (aq) Na2SO3 (aq) + H2O (l) A. C. 6 B. 22. 1 4 D. 2 One of the steps in preparing nitric a...
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