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Suppose after developing the color of your unknown compound, the Spec 20 cannot measure the absorbance, it is too high. How could you obtain the concentration of Cr(NO3)3 in your sample?
Chlorous acid, HClO2, has a dissociation constant of Ka = 1.20 * 10^(-2). Assume that you have a 0.0755 m solution of this acid and calculate the concentration of H+ cations in the solution and degree of dissociation for a solution of the acid
Calculate the change in pH when 3.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
Consider a lithium nucleus, of charge +3q Calculate the first three electron energies for an electron in Li++ ion
Explain A particular 12V battery is based on a reaction having a standard cell potential, E0+1.92 V. Define what happens when the battery "dies"
if 32 ml of 6.8 h2so4 was spilled what is the minimum mass of nahco3 that must be added to the spill to neutralize the
A particular brand of gasoline has a density of 0.737 g/mL. How many grams of this gasoline would fill a 15.6 gal tank?
What is the oxidation number of the monoatomic ions of the following elements. Sr,Rb, Na, Al,O,Se, Ba,I, Fr, Cl, N
A colored substance Z has an absorption maximum at 350 nm. A solution containing 2 mg of Z per liter had an absorbance of 0.850 using a 1 cm cell. The formula weight of Z is 148.
FIRST THING: Also, though more important for stage 2, you will need to determine why you are doing the risk assessment.
a 34.9-g sample of an unknown metal initially at 232.8oc is immersed in a 17.0-g sample of water specific heat 4.184 j
At a temperature of 250K, the molecules of an unknown gas, Z, have an average velocity equal to that of HI at 500K. What is the identity of the gas
Show your calculations for the pH when 0.00 mL, 4.00 mL, 6.00 mL, 12.00 mL (equivalence point), and 16.00 mL of 0.10 M HCl have been aded to an initial
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