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A reaction yields a colored product and the absorbance at a given wavelength increases at 0.2 per minute. The molar absorbtivity of the product is 4.0 ?M-1cm-1. What is the rate of product formation? Use correct units.
A 20.0 ml sample of 0.200 M Hbr solution is titrated with 0.200M of NaOH solution. Calculate the pH after 16 ml of NaOH has been added.
Consider the following reaction for the dissociation of benzoic acid (MW=122 g x mol^-1) in water where Ka for benzoic acid is 6.5 x 10^-5. C6H5COOH(aq) + H2O (l) C6H5COO-(aq) + H30+(aq)
the freezing point of the solution is 5.144 degrees celcius. Pure benzene freezes at 5.444 degrees celcius and has a Kf of 5.12 degrees celcius/m. What is the molar mass of thyroxine
A buffer solution with a pH reading a 8.50 was prepared by mixing 0.25 mole acid (HA) and 0.05 mile NaOH in 500.0mL DI water. How much more gram of NaOH you should add to this solution in order to have the highest buffer capacity of this solution
A balloon is filled to a volume of 9.00 multiplied by 102 mL at a temperature of 18.0°C. The balloon is then cooled at constant pressure to a temperature of 1.00 multiplied by 102 K. What is the final volume of the balloon?
When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid. Assume water has a density of 1.00 g/cm3 at the temperature of the measurement.
Write Lewis structures, including resonance structure and formal charges if necessary
total ion concentration what conductivity should be observed for 0.050 M Na2SO4?
State molecular geometries for the reactants and the product of the reaction of PF5 with the Lewis base NH3 (what adduct is formed?). Include geometry and formal charges in the structures. Also, what hybridization changes occur when PF5 reacts wit..
Water and 8.00 mol/L potassium nitrate solution are mixed to produce 700 mL of a solution with a concentration of 6.00 mol/L. What volumes of water and potassium nitrate solution are used?
What is the hydronium ion concentration and the pH of a solution formed when 30mL of 0.30M HNO3 is titrated with 43mL of 0.20M NaOH at 25C?
What mass of water (in grams) forms from the reaction of 2.58 L of hydrogen gas and 2.26 L of oxygen gas?
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