3.30 Box (a) represents 1.0 mL of a

3.30 Box (a) represents 1.0 mL of a

3.30 Box (a) represents 1.0 mL of a solution of particles at a given concentration. Which of the boxes (b)(d) represents 1.0 mL of the solution that results after (a) has been diluted by doubling the volume of its

solvent? 3.31 Reaction of A (green spheres) with B (blue spheres) is shown schematically in the following diagram:

Which equation best describes the stoichiometry of the reaction? (a) A2 2 B A2B2 (b) 10 A 5 B2 5 A2B2 (c) 2 A B2

A2B2 (d) 5 A 5 B2 5 A2B2 3.32 Cytosine, a constituent of deoxyribonucleic acid (DNA) can be represented by

the molecular model at the top of the next column. If 0.001 mol of cytosine is submitted to combustion analysis, how many moles of and how many moles of would be formed? 3.33

If blue spheres represent nitrogen atoms and red spheres represent oxygen atoms, which box represents reactants and which represents products for the reaction 2 NO(g) O2(g) 2 NO2(g)?

3.34 Fluoxetine, marketed as an antidepressant under the name Prozac, can be represented by the following balland-stick molecular model. Write the molecular formula for fluoxetine, and calculate its molecular mass (red O, gray C. blue N, yellow-green F, ivory H).

3.35 Assume that the buret contains H ions, the flask contains OH ions, and you are carrying out a titration of the base with the acid. If the volumes in the buret and the flask are identical and the concentration of the acid in the buret is 1.00 M,

what is the concentration of base in the flask? 3.36 The following diagram represents the reaction of A2 (red spheres) with B2 (blue spheres):

(a) Write a balanced equation for the reaction, and identify the limiting reactant. (b) How many moles of product can be made from 1.0 mol of A2 and 1.0 mol of B2 ? 3.37

A hydrocarbon of unknown formula CxHy was submitted to combustion analysis with the following results. What is the empirical formula of the hydrocarbon?

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