mg/L of cell tissue and 10 mg/L of ammonia
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- In the table below, name each functional group in anserine that is ionizable and record an estimated pKaGiven the equation of the line, y=150x-8.1221 (cells per mL is in 10^8), what is the CFU per mL of the original suspension if the thousand-fold dilution of that suspension has an absorbance of 0.3 at 600nm? * A. 3.7 x 10^12 B. 3.7 x 10^9 C. 3.7 x 10^1 D. None of these is correctIn an experiment, what happens to the calculated molar mass after waiting an hour between thawing the frozen cyclohexane and adding the unknown compound, during which time some of the cyclohexane evaporated. Will the molar mass be too large, too small, or unaffected? Explain.|
- The osmotic pressure of human blood is 7.6 atm at 37 °C. What mass of glucose, C6H12O6, is required to make 1.00 L of aqueous solution for intravenous feeding if the solution must have the same osmotic pressure as blood at body temperature, 37 °C?Based on the Henderson-Hasselbalch equation (shown below), calculate the pH when half of a solution of acetic acid is dissociated to acetate (the pKa of acetic acid is 4.76). A. 1.00 B. 3.76 C. 4.76 D. 5.76If the osmotic pressure of a 7.96×10-2-M aqueous solution of Fe2(SO4)3 was found to be 8.71 atm at 20°C, what would be the "observed" van't Hoff factor? Use the above van't Hoff factor to predict the freezing point of this solution.Note that the corresponding molality would be 8.25×10-2 m, given that the density of the solution is 0.997 g/cm3. °C Use the above van't Hoff factor to predict by how many degrees the boiling point of this solution will be elevated above that for pure water.
- Consider a buffer solution that contains 0.55 M NH2CH2CO2H and 0.35 M NH2CH2CO2Na. pKa(NH2CH2CO2H)=9.88. a. Calculate its pH. b. Calculate the change in pH if 0.155 g of solid NaOH is added to 250 mL of this solution. c. If the acceptable buffer range of the solution is ±0.10 pH units, calculate how many moles of H3O+ can be neutralized by 250 mL of the initial buffer.The ΔG°′ value for glucose-1-phosphate is -20.9 kJ/mol. If glucose and phosphate are both at 4.8 mM, what is the equilibrium concentration of glucose-1-phosphate?Creatinine, C4H7N3O, is a by-product of muscle metabolism, and creatinine levels in the body are known to be a fairly reliable indicator of kidney function. The normal level of creatinine in the blood for adults is approximately 1.0 mg per deciliter (dL) of blood. If the density of blood is 1.025 g/mL, calculate the molarity of a normal creatinine level in a 10.0 mL blood sample.
- Calculate the number of milliliters (mL) of a solution which contains 16 g of BaCl2 per liter which will be required to precipitate the sulfur as BaSO4 in a 0.60 g sample that contains 12% S.A 0.0284 M aqueous solution of lactic acid, HC3H5O3, a substance that accumulates in the blood and muscles during physical activity, is found to be 6.7% ionized. Determine the value of Ka for lactic acid.Using this data, calculate the molarity of the oxalic acid standard solution.
