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Problem- What hydrogen ion concentration should be required to dissolve 0.10M MgF2 if the Ksp for magnesium fluoride is 6.8x10^-9 and Ka for HF is 6.5x10^-4?
Show all work I'm being very generous with points.
A 1.80 g sample of a large boimolecule was dissolved in 18.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
if you knew an electron transfer center in a protein had a reduction potential of -400 mv what would be the most likely
Which one of the following is a redox reaction?
Caffeiene is 28.84% N by mass. It's molar mass is between 190 and 200 grams/mol. Explain what is the formula for caffeine
the red lice in the hydrogen spectrum is caused by the electron moving between which two energe levels? (the ionization energy of a hydroge atom is 2.18X10^-18J)
Solder is used in the electronics industry because it has a low melting point and can make durable electrical connections between copper wires. Electronic solder is an alloy of tin and lead.
A sample of gas has a mass of 5.00 mg and occupies a volume of 4.13 mL at 23ºC and 745 torr. What is the molecular weight of the gas?
Determine the empirical formula of the amino acid, given an amino acid which consists of the elements carbon, hydrogen, nitrogen, and oxygen.
What is the pH of the sodium phosphate buffer described in problem #1 if 1 ml of 10M NaOH is added? What is the pH of 1 liter of water if 1ml of NaOH is added?
Explain how would you make 100ml of a carbonic acid buffer at 0.2M as well as ph =9.8 using 0.5M HCO3 and either 0.1M NaOH or 0.1M HCl and water
Henry's constant for CO in water at 25 degrees Celsius is 9.71 x 10^-4 mol/L atom. How many grams of CO will dissolve in 1.00 L of water at a CO partial pressure of 2.75 atm
Draw the skeletal structure of the major organic product formed inthe reaction below when the second step is heated to reflux.
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