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A solution transmittance is 35% at 260 nm. What will the solution absorbance be if you dilute 25.0 ml?
what is the pressure in a 22.7l cylinder filled with 10.8 g of oxygen gas at a temperature of 343
a solution is prepared by mixing 62.0 ml of 5.00 m hcl and 30.0 ml of 8.00 m hno3. water is then added until the final
a gas sample containing 1.35 mol at 25degc exerts a pressure of 405 torr. some gas is added to the same container and
Please note that NO3 has an odd number of electrons. But you must decide where the missing electron will be. Does the central atom violate the octet rule or do the oxygen atoms? Use formal charges to decide.
A healthy stream has an oxygen concentration of 0.00850 g/L. Assuming no biological process affects this concentration, what must be the pressure of oxygen
A soft drink contains 44 mg of sodium in 325 g of {rm H_2O}. What is the concentration of sodium in the soft drink in mass percent?
The water solubilities of oxalic acid and sodium oxalate at room temp are 10g/100ml and 3.7g/100ml respectively. Could you prepare oxalic acid by adding HCl to a solution of sodium oxalate, cooling it to room temp, and filtering the resulting mixt..
calculate the amount of heat released when 50g of steam at 100 degrees celsius hits the skin condenses and cools to a
A solution of 5.0 g/L of HY has the same pH as one containing 10.0 g/L of HZ. Which is the stronger acid. Please explain.
suppose that 1.02 of rubbing alcohol evaporates from a 75.0 aluminum block. if the aluminum block is initially at 25c
derive Raoul's law using the chemical potentials of the constituents that make up the mixture of the solution.
The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.60 mL of a 0.330 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
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