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Determine the pH of a solution that is 3.45% KOH by mass. Assume that the solution has density of 1.01gmL-1.
What will the pH be after 0.0100 mol of NaOH is added to the solution? Ka for HNO2 = 4.5x10^-4
Question- Describe the similarities and differences between DNA gel electrophoresis and SDS-PAGE. Provide at least 3 differences.
How many seconds after the start of the reaction does it take for the reactant concentration to decrease to 0.0185 M?
A unknown solution of compound A in the same solvent was diluted from an initial volume of 2.00mL to 25.00mL and had an absorbance of 0.733 at 238 nm in a 1.00 cm cuvet. What is the concentration of the unknown solution
in which series are the carbon-carbon bond lengths arranged in the correct order from shortest to
An aqueous solution is 1.00% NaCl by mass. Its density is 1.071 g/mL at 25°C. The observed osmotic pressure of this solution is 7.83 atm at 25°C.
Calculate the maximum concentration in M of silver ions in a solution that contains 0.025 M CO3^2-. The ksp of AG2CO3 is 8.1 x 10^-12
Problem- A 17.75liters sealed vessel contains 1.512g of hydrogen , 4.000g of oxygen, 4.750g of florine and 33.52g of kypton at 28.0°c. 1) What is the pressure in the vessel
what would happen to the pressure of a confined gas sample if the volume of that sample was decreased while the
In an aqueous solution that contains 285 mg of trichloroacetic acid (HA), Cl3CCOOH (163.4 g/mol) in 10.0 ml. Calculate: 1) Analytical molar concentrations of HA species
the temperature unknown. When the volume changes to 1.68L the temperature is found to be -220oC. What was the initial temperature in C?
a rectangular block has dimensions 2.9 cm . 3.5 cm . 10.0 cm. the mass of the block is 615.0 g. what are the volume and
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