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Execute the following mathematical operations and express each answer in scientific notation with the correct number of significant figures.
a) (3.029 x 10^3)(13.28/0.2200)-0.00112
b) ((2.556 - 8.32)/(192.54 + (-311.23))
Codeine, C18H21NO3, a commonly prescribed painkiller, is a weak base. A saturated aqueous solution contains 1.00 g codeine in 120 mL of solution and has a pH = 9.8. What is the Kb of codeine?
a coffee contains 100 mL of H2O. initial temperature of calorimeter is temperature 23 C.if 8.20 g of CaCl2 is added to calorimeter. what will be the final temperature of the solution in the calorimeter.
How many moles of carbon, hydrogen, & oxygen are present in a 100g sample of ascorbic acid? Ascorbic acid (vitamin C) contains 40.92% carbon, 4.58% hydrogen, and 54.50% oxygen by mass. Assume a 100 g sample of ascorbic acid.
When a piece of copper wire is placed in a colorless solution of silver nitrate, the surface of the wire becomes coated with a shiny silvery material, and the copper begins to form aqueous copper(II) nitrate, which is blue. Which of the following ..
Determine the pH of a solution containing A) neglecting activities. B) including activities The solution contains BOTH chemicals
Molar concentration, 2.20g of solid NaOH are added to 250mL of a 0.10M FeCl2 solution. Given that Ksp for Fe(OH)2 is 1.6 x 10 -14, calculate the following
trans-2-Butene is more stable than cis-2-butene by only 4 kJ/mol, but trans-2,2,5,5-tetramethyl-3-hexene is more stable than its cis isomer by 39 kJ/mol. Explain.
Plan and Design Lab: To Determine the water of crystallization of a hydrated salt XY•nH2O and to determine the value of n in the formula XY•nH2O with a relative formula mass of 392.14.
What is the overall order of the reaction?
A gaseous mixture of O2 and Kr has a density of 1.140 g/L at 415 torr and 300. K. What is the mole percent O2 in the mixture?
classfy each reaction as cmbnation, decompositon, single replacement, double replacement, or combustion
Dimethyl sulfoxide is an aprotic dipolar solvent that readily dissolves many inorganic salts. Water is a protic dipolar solvent that dissolves inorganic salts.
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