6.65 mL of 0.015 M NaOH is used to titrate 40 mL of an HCl solution. Calculate the concentration (molarity) of the HCl solution.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

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If you used the method of initial rates to obtain the order for no2, predict what reaction rates you would measure in the beginning of the reaction for initial concentrations of 0.200 m, 0.100 m, & 0.050 m no2.