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A 25 mL sample containing Cu2+ gave an instrumentsignal of 23.6 units (corrected for a blank). When exactly 0.5 mLof 0.0287 M Cu(NO3)2 was added to thesolution, the signal increased to 37.9 units. Calculate the molar concentration of Cu2+ assuming that the signal was directly proportional to the analyte concentration.
Why does an object with a greater mass have a higher density than an object with a higher volume but a lower mass
What is the pH of a one liter mixture of .15 M nitrous acid and .20 M sodium nitrite after .020 mol of HCl have been added (no change in volume). (Ka for nitrous acid is 4.0x10^-4.
a sample of gas has a volume of 0.106 L at 37 degrees Celsius and 0.920 atm. what is the volume of stp (1 atm and 0 degrees Celsius)
calculate the amount of heat required to heat a 43 sample of ethanol from 14.0 to 19.0. specific heat capacity of
used the balance equation n2 o2-------2no to answer the following questions1.how many grams of no are formed from
Both potassium chloride (KCL) and potassium hydroxide (KOH) are very soluble in water. However, as one increases the temperature of the solution, KCL becomes more soluble and KOH becomes less soluble. Explain
n2 react with hydrogen gas to form nh3 if 14.01 g sample of n2 react with 4.07g of h2 determine how many of nh3 is
Calculate the Root Mean Square Speed and its average kinetic energy per molecule of Nitrogen and water vapor
Write the Kb reaction of hypochlorite, OCl-. Given that the Ka valuse for HOCl is 3.0x 10^-8 calculate Kb for OCl-
As a food chemist for a major potato chip company, you are responsible for determining the salt content of new potato chips products for the packaging label.
A solution is prepared with initial concentrations of .038 M AL^3+ and .29 M NaF. If the Kf for AlF6^3- is 7.0 * 10^19, what is the concentration of Al^3+ (aq) at equilibrium?
the elementary chemical reactiono clo--gtcl o2is made pseudo-first order in oxygen atoms by using a large excess of
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