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1. Explain why viruses are not considered 'alive' and discuss why this may not be an appropriate classification.
2. Why are antiviral drugs often ineffective?
3. What is the goal of natural selection?
Explain what is the pH at the point during a titration when 31mL of 0.200 M HCL has been added to 27mL of 0.0500 MNH3 solutions. HCL is strong acid, Kb = 1.8×10-5 for NH3.
If the volume of the flask is 135 ml the temperature of the bath is 100C also atmospheric pressure is 760torr. If the average molar mass of air is 29.0 g/mol.
What solutions do you use at work? How would you calculate the amount of solute to the solvent in order to prepare the solution?
What is the pH of the resulting solution when 24.88 mL of 8.00 M KOH is added to a 1.36 liter solution that has 0.63 M acetate ion CH3COO- and 0.64 M acetic acid CH3COOH? Ka = 1.76 x 10-5
What is the molar solubility of PbI2 in water. For PbI2, Ksp=7.9x10-9. You may assume that the ions do not form ion pairs in solution. Give your answer in moles per litre, accurate to two significant figures.
Calculate the vapor pressure of a solution made by dissolving 75.9 g of urea (molar mass= 60.06 g/mol) in 197.5 mL of water at 35C. (Hint: the vapor pressure of pure water at 35C is given
Consider a calorimeter that has a Ccup value of 50 J oC-1. If this calorimeter increases in temperature by 11.4 oC, how much energy, in kJ, was absorbed by the cup? Report your answer to two decimal places. Do not include units when you type in you..
How many mL of 0.450 M NaOH are needed to titrate 25.0 mL solution of 0.250 M FeCl3 solution? FeCl3 aq + 3NaOH arrow to Fe(OH)3 aq +3NaCl aq
0.497ml sample of HClO4 has a pH of 0.2251. If 647ml of distilled water was added to the HClO4 solution, what would be the new pH of solution be
0.1278- sample that is 97.50% As2O3 by mass had been used in the titration, how many milliliters of the 0.02140M KMnO4(aq) would have been required?
If 508 nm is directly related to the d-orbital splitting Fe2+ o-phen complex, explain how this wavelength would change (become higher, lower, or stay the same) if we changed the reaction from using Fe2+ to Fe3+. Explain why the wavelength change o..
Unit Conversions A solution (? = 1.03 g/mL) that is a mixture of water and 5wt% sufuric acid (H2SO4) ?ows through a 45-m long pipe with a 6.0 cm diameter at a rate of 87 L/min. a. What is the molarity (mol/L) of sulfuric acid in the solution?
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