2 attempts left Check my work Be sure to answer all parts. A biochemical engineer isolates...
Hy 1.008 664,427 0 15.964 18. A biochemical engineer isolates a bacterial gene fragment and dissolves a 20.6. mg sample of the material in enough water to make 41.5 mL of solution. The osmotic pressure of the solution is 0.340 torr at 25.0°C. (a) What is the molar mass of the gene fragment (5 pts)? 2mci we6 .0206 s .0415 C= .0206 ms.
A biomedical engineer is working in a lab that is isolating gene fragments. She dissolves a 10.0mg sample in enough water to make 30.0mL of solution. The osmotic pressure of the solution is 0.340torr at 25C. What is the molar mass of the gene fragment? If the solution density is 0.997g/mL, what is the freezing point for this aqueous solution?
[References] What volume of ethylene glycol (C2HO2), a nonelectrolyte, must be added to 12.0 L water to produce an antifreeze solution with a freezing point of-19.0°C? (The density of ethylene glycol is 1.11 g/cm°, and the density of water is 1.00 g/cm³. K, for water is 0.51°C•kg/mol and Kf is 1.86°C kg/mol.) Volume %3D What is the boiling point of this solution? Boiling point °C %3D 5 item attempts remaining Submit Answer Try Another Version [References] Consider an aqueous solution...
3 attempts left Check my work Be sure to answer all parts. Calculate the molalities of the following aqueous solutions: (a) 127 M sugar (CiHOn) solution (density of solution 1.12 g/mL) 1.85 (b) 0.829 M NaOH solution (density of solution 1.04 g/mL (c) 5.21 M NaHCO solution (density of solution 1.19 g/mL) 2 3 4
3 attempts left Check my work Be sure to answer all parts A solution of 5.06 g of a compound having the empirical formula CoHjP in 25.0 g of benzene is observed to freeze at 2.3°C. Calculate the molar mass of the solute and its molecular formula. 615 Molar Mass Molecular Formula The normal freezing point of benzene is 5.50°C and the Kf for benzene is 5.12°C/m.
2 attempts left Check my work Be sure to answer all parts. milliliters of a 0.17 M sucrose solution contain each of the following number of grams? How many The molar mass of sucrose (C12H22O11) is 342.3 g/mol. a. 8.69 g mL b. 50.0 mg mL
2 attempts left Check my work Enter your answer in the provided box. A solution of 1.15 g of solute dissolved in 25.0 mL of H20 at 25°C has a boiling point of 100.750°C. What is the molar mass of the solute if it is a nonvolatile nonelectrolyte and the solution behaves ideally (d of H20 at 25°C = 0.997 g/mL)? g/mol
2 attempts left Check my work Be sure to answer all parts. Calculate the density in grams per liter of the following gases at 25.0°C and 705 torr. (a) NO (6) NO2 (c) O2 gL
10 attempts left Check my work Be sure to answer all parts Report HI A 10.0-ml solution of 0.540 M NH, is titrated with a 0.180 M HCl solution. Calculate the pH after the following additions of the HCl solution: Guided (a) 0.00 mL (b) 10.0 mL (e) 30.0 mL @?@@@@ ONE (d) 40.0 mL
obiol. Homework Saved 2 attempts left Check my work Be sure to answer all parts. Report problem How many total moles of ions are released when the following sample dissolves completely in water? Enter your answer in scientific notation. Guided Solution 7.88 x 10 formula units of FeCl3 = x 10 mo