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In a diagnostic test for leukemia, a person receives 3.8 mL of a solution containing selenium-75. If the activity of the selenium-75 is 43 μCi/mL , what dose, in microcuries, does the patient receive?
A 0.093 M aqueous solution of CuSO4 exhibits an absorbance of 0.897. If the cuvette has a width of 1.13 cm, what is the molar absorptivity of the solute?
1.what is the ph of the solution created by combining 11.50 ml of the 0.10 m naohaq with 8.00 ml of the 0.10 m
delta H=483.6 kJ/mol If 2.0 moles of H2O(g) are converted to H2(g) and O2(g) against a pressure 1.0 atm at 145 degrees C, what is the delta E for this reaction?
Which of the following pairs of molecules is listed in order of decreasing net dipole moment (from more polar molecule to less polar molecule) A. SF4 > CF4 B. CO2 > SO2 C. CCl2F2 > CH2F2 D. XeF4 > SeF4
Calculate the pH of a buffer solution made by mixing 44 ml of a 0.06 M ammonia solution with 60 ml of a 0.10 M ammonium nitrate solution. Give the pH to two decimal places.
Calculate ?H, q and w when 1.00 mol of helium at 5.00L and a temperature of 298.15K is expanded and heated simultaneously
in the reaction between potassium carbonate and calcium nitrate balanced eq k2co3 cano32--gt k2no32 caco3 why wouldnt
An experiment shows that a 238mL gas sample has a mass of 0.429g at a pressure of 745mmHg and a temperature of 34C. What is the molar mass of the gas
Draw electron dot structure for the following molecules or ions notes En (electronegativity of Sb, Se, CL O are 1.9, 2.4, 3.0 respectively (a) SbCL3 (b) SeOCL2 (c) BF4- (d)C2H5CL
In a separate experiment, all the sulphur in another 0.464 g sample was converted to 0.859 g of BaSO4. What is the empirical formula of the unknown compound
In milk at 37 C, lactobacillus acidophilus has a generation time (doubling time) of about 75 minutes. Calculate the population relative to the initial value at 30,60,90 and 150 minutes
write a electrn configuration for an octahedral complex, write the electron configuration for [RhCl6]^-3 in terms of MO labels for ground electronic state.
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