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One liter of water will dissolve 2.15* 10^-3 mol of PbF2 at 25 degrees c. Calculate the value of ksp for PbF2.
When the electrons return to the ground state, they lose the excess energy in the form of 640 nm photons. What is the energy gap between the ground state and excited state in the laser material? answer is in J i was absent in class and my test is ..
A balloon filled with helium gas has a volume of 741 mL at a pressure of 1 atm. The balloon is released and reaches an altitude of 6.5 km,where the pressure is 0.5 atm.
calculate the pH of the solution that results when 40.0 mL of 0.100 M NH3 is mixed with 20.0 mL of 0.250 M HCl solution.
Give the reaction products of sodium borohydride (followed by acidification) with the following compounds. a) acetone
calculate the concentration in molarity of a NaOH solution if 25.0 ml of the solution are needed to neutralize 17.4 ml of a .312 M HCl solution.
What polypeptide would be synthesized from the following template strand of DNA:3' CGG AGA CGG ACG 5'. What is the amino acid sequence that is coded by mRNA sequence 5' AAG GCU AGU GGC 3'
Use the stoichimetery of the equation and the dilute titanium 4 chloride solution for the following: How many moles of solid product can be formed?
How much heat is required to warm 225 g of ice from -44.7°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?
A 50 mL soln. of Mg(NO3)2 is mixed with a 50 mL solution of NaOH. The resulting precipitate, Mg(OH)2, that forms is 2.97g. Determine the concentration of solution of Mg(NO3)2
if a gas occupies a volume of 5 L at 546 K and 2.5 atm, what is its volume at standard pressure and temperature.
A 100g sample of water at 27oC is poured into a 76.2g sample of water at 89oC. What will be the final temperature.
find delta H for the solution of 1g NaOH in water d) find delta H for the solution of 1 mole NaOH in water e) Given the following heats of formation
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