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Which of the following are not soluble in water? Remember that the solubility rules apply to ionic compounds, but not necessarily to covalent compounds or acids.
KNO3 CCl4 Fe(OH)2 HgCl2 HClO MgI2 PbSO4
Al(C2H3O2)3 Cu3(PO4)2 CoBr2 Ba(OH)2 CaF2 HCl N2
Name two amino acids that are mostly positively charged at neutral pH. A Lysine and arginine B Histidine and arginine C Cysteine
The concentration of this compound in the sample is 0.000030 M and the path length of the sample is 1.0 cm
The atomic mass in g mol of Fe=55.85, S=32.07 O=16, calculate the number of moles of the negative ions present in 7.45g of iron (III) sulfate.
The first ionization energy of bismuth is Ei1 = +703 kJ / mol. What is the longest possible wavelength of light that could ionize an atom of bismuth?
A standard oxalic acid solution is 0.065 M. It was prepared by dissolving H2C2O4*2H2O in distilled water.
How many grams of copper are in the necklace? 3. If 18-karat gold has a density of 15.5 , what is the volume in cubic centimeters?
What mass of precipitate forms when 124.5 mL of 0.660 M NaOH is added to 517 mL of a solution that contains 10.9 g aluminum sulfate per liter?
calculate the mol O2 added in the air, using the fact that the N2 in the ?ue gas equals the N2 added in the air. Then make a carbon balance to obtain the total moles of C added.)
how many N2 molecules can be produced after the explosion of 2.37 kg of NH4NO3? (Molar mass of NH4NO3 is 80.06 g/mol.)
The pI can be estimated fairly accurately (within 0.1 or 0.2 pH units) from the pK values of all the proton dissociable groups in the peptide. Using pK values from the table at the right, estimate the pI value of the following hexapeptide
A green leaf has surface area 2.20 cm^2. If solar radiation is 1190 W/(m^2) , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation.
if a sample of gas has fixed volume, and under a standard atmosphere of pressure, if its temperature is raised from 20 degrees celsius to 40 degrees celsius
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