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Calculate the mass (include units) of the unknown sample to produce 250 mL of a solution at about [Ca2+] = 0.005 M. Assume that the weight percent of CaCO3 in the unknown is 50%
For analysis, a short peptide seven residues long is treated with FDNB, followed by complete acid hydrolysis and amino acid chromatography. What are the products of these steps. What kind of information can be obtained by amino acid chromatography..
Briefly describe the adverse effects caused by exposure to radiation. Include some specific exposure levels associated with these significant health effects.
Calculate the formula of a compound, given that 55.85 g of iron combines with 32.06g of sulfur.
Calculate the solubility of zinc hydroxide, Zn(OH)2, in 1.00 M NaOH. Ksp = 3.0 × 10-16 for Zn(OH)2, Kf = 3.0 × 1015 for Zn(OH)42-
A certain mixture of He and Ne in a 356 cm3 bulb weighs 0.1480 g and is at 20.0 oC and 748 torr. Find the mass and mole fraction present.
H2SO4, for the first step instead of concentrated HNO3 . What changes will be observed for the initial reaction with copper metal?
Comparing potassium nitrate (KNO3) and sodium chloride (NaCl), which chemical's solubility (in water) is most affected by change in temperature.
The voltaic cell described by the balanced chemical equation has an Eo of 0.27 V. Calculate the maximum electrical work (kJ) the cell has done if 3.1400 mol of Cr3+(aq) (Molar Mass - 52.00 g/mol) forms. Round your answer to 3 significant figures.
Determine the point group of each of the three possible geometries of the hypothetical Be3+ on, ten draw the molecular orbitals for each geometry,
What is the mRNA sequence for the following segment of DNA: GACTATCCCATAGAG Based upon the mRNA sequence, what is the peptide sequence
Nitric oxide, oxygen, and nitrogen react by the following equation. 2 NO(g) N2(g) + O2(g)Kc = 2.3 10^30 at 298 K
Complete the following reactions. Draw structural formula for each reaction. In each case state the type of reaction that is occurring.
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