Medical chemistry and biochemistry 1. Calculations (conversions of ...

Medical chemistry and biochemistry1. Calculations (conversions of units, osmolarity, preparation of solutions, molarity xdensity)1. Convert the following values into units mentioned in parentheses.a) 1700 ng/mL → (mg/L) [1.7 mg/L]b) 60 pmol/µL → (mmol/L) [0.06 mmol/L]c) 0.95 mg/mL → (g/L) [0.95 g/L]d) pO 2 = 115 mmHg → (Torr) [115 Torr]e) pCO 2 = 61.8 mmHg → (kPa) [8.2 kPa]f) 180 kcal → (kJ) [753.6 kJ]2. Calculate the concentration of osmotic effective particles in MgCl 2 solution withmolar concentration 0.3 M.[0.9 osmol/L]3. The osmolarity of Na 2 HPO 4 solution is 0.9 osmol/L. What is the molarity of thissolution?[c = 0.3 mol/L]4. Calculate the concentration of osmotic effective particles in 0.1 M NaCl solution inmosm/L.[200 mosm/L]5. Native erythrocytes were placed into the following solutions:a) 0.3 M glucoseb) 0.3 M NaClc) 0.15 M glucosed) 0.15 M NaClOsmolarity of erythrocyte cytoplasm is 0.3 osm/L.In which solution(s) (mentioned above) a water will pass into erythrocytes and thesecells will be damaged?[c) it is a hypotonic solution]6. If the number of moles of toluene is 0.66 mol, what is the volume (in cm 3 ) of thetoluene? Density of toluene = 0.88 g/cm 3 , Mr (toluene) = 92[V = 69 cm 3 ]7. How many milligrams of glucose are required for preparation 0.15 L of a 12mmol/L solution? Mr (glucose) = 180[324 mg]8. If 50 µL of uric acid solution has molarity 357 µmol/L, what is the weight (inmilligrams) of uric acid in this solution? Mr (uric acid) = 168[0.003 mg]9. If 11.3 g NaCl is dissolved in 325 mL of water, what is the weight concentration(g/L) and molarity (mol/L) of the solution?Mr (NaCl) = 58.5, density of NaCl solution = 1 g/cm 3[33.6 g/L, c = 0.57 mol/L]

10. The patient excreted 1500 mL of urine per 24 hours. Chemical analysis showsthe urine creatinine mass of 2.625 g in 1500 mL of urine. Calculate the creatininemolarity in mmol/L.Mr (creatinine) = 113[c = 15.5 mmol/L]11. 1 liter of human blood plasma contains about 100 mmol Cl - . How many miligramsof Cl - are found in 1 mL of plasma? Ar (Cl) = 35.5[3.55 mg]12. Calculate the weight of 0.9 % NaCl solution that contains 720 mg NaCl.[80 g]13. Calculate the mass (in grams) of pure ethanol in 0.5 dm 3 of 40% solution (v/v).Density of 100% ethanol equals 0.7893 g/cm 3 .[157.86 g]14. How many grams of AgNO 3 are required for preparation 750 mL of 20 mMsolution? Mr (AgNO 3 ) = 170[2.55 g]15. How many mililiters of 68% HNO 3 are required for preparation 0.5 L of 1.0 M nitricacid solution? Density 68% HNO 3 = 1.4 g/mL, Mr (HNO 3 ) = 63[33.09 mL]16. Calculate the volume of 70% HClO 4 (in mL) you need for preparation of 0.5 L of0.2 M HClO 4 . An information found on the bottle of the 70% HClO 4 is followed:density = 1.67 g/cm 3 , relative molar mass of HClO 4 = 100.5[8.6 mL]17. A 2 M H 2 SO 4 solution has density 1.1 g/cm 3 . What is the percent by mass of thissolution? Mr (H 2 SO 4 ) = 98[17.8 %]18. What is the percent by mass concentration of a 2.81 M HNO 3 solution (density =1.18 g/cm 3 )? Mr (HNO 3 ) = 63[15 %]19. What is the molarity of 96 % H 2 SO 4 solution? Density of H 2 SO 4 solution is 1.86g/cm 3 . Mr (H 2 SO 4 ) = 98[c = 18.22 mol/L]20. Calculate the molarity of 15% HCl solution. Density of HCl solution is 1.047g/cm 3 . Mr (HCl) = 36.5[c = 4.3 mol/L]