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What are some possible sources of error in your calculated atomic weight for Mg? A. Calculate the % Absolute error. B. Calculate the % relative error in the mass, volume, temperature, and other measurements. C. Which (if any) measurement accounts for the error in the final result? D. What other errors might be involved? Does the ideal gas law really apply?
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.
Calcium oxide (lime) reacts with carbon dioxide to form calcium carbonate (chalk). CaO(s) + CO2(g) ? CaCO3(s) ?H = -178.4 kJ (a) Is this reaction exothermic or endothermic?
Ethanethiol (C2H6S) is a compound with a disagreeable odor that can be used to impart an odor to natural gas. When ethanethiol is burned, the sulfur reacts with oxygen to form SO2
A solution contains 1.0 x 10-5 M Na3PO4. Calculate the minimum concentration of Ag+ that would cause precipitation of solid Ag3PO4.
A student in lab constructed an Ag+ sensor using the same procedure as in the Metal Ion Sensor lab that you performed. Titration of 10.00 mL of an AgNO3 solution diluted with 40.0 mL of DI water required 11.85 mL
At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 46 torr to decay to 25.8 torr?
In an experiment, 1.26 grams of iron combines with oxygen to give a compound that has a mass of 1.80 grams. What is the empirical formula of the compound?
The molarity (moles/L = M) of a solution of 4.0 g NaOH in a total volume of 100.0 mL (or 40 g in 1.0 L) is what?
What is the value of the equilibrium constant for the cell reaction below at 25°C? E°cell = 0.30 V
Calculate the hydrogen ion concentration for an aqueous solution that has a pH of 3.45.
Write a complete mechanism for the addition of diethyl malonate to ethanal in the presence of base to form a beta-hydroxy ester.
CaH2(s) + 2H2O(l) Ca(OH)2(aq) + 2H2(g) How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 10.0 L of H2 gas if the pressure of H2 is 769 torr at 28.0°C?
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