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A metal has denisty 6.4g/cm3 is dropped into water upto 90.6ml the water rise 121.4 ml compute mass of metal
Four of the following statements about the ammonia molecule, NH3, are correct. One is not. Which one. A) The ammonia molecule is tetrahedral.
A sample of nitrogen occupies a volume of 250mL at 27 degrees C and 700 mmHg of pressure. What will be its volume at STP?
calculate the number of kilograms of helium needed to inflate a balloon to a volume of 100000 l at an atmospheric
A certain substance has a heat of vaporization of 53.88 kJ/mol. Define at what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 319 K
State the Ksp Equilibrium Constant for the reaction of Ag+ and Cl- to form AgCl(s). The Ksp of AgCl is 1.82x10-10 at 25 degrees C.
Describe a simple and practical way to make 1.00L of this buffer solution, assuming 1.0 M solution of the molecular base is available and that the chloride salt of the conjugate acid is available as a SOLID.
a) Calculate the potential of the two cells. b) Write the overall balanced redox equations for the reactions above. c) Calculate ?G for the conditions given for reactions above.
An electron in a hydrogen atom has undergone a transition from N = 4 to N = 3 energy levels. Find out the energy of the photon that is emitted in electron volts.
An antacid tablet requires 25.82 mL of a .200 M HCl to titrate to its equivalence point. What Volume in mL of stomach acid can be neutralized by the antacid tablet? assume that stomach acid has a pH of 1.1.
Determine the number of moles of oxygen that react completely with 8.0 moles of C2H6 based on the following balanced equation.
5 ml of acetic anhydride and 5 drops of phosphoric acid is added to 2 g of salicylic acid. Calculate the molar excess of the acetic anhydride (density = 1.08 g/ml)
The titration required 35.46 mL of 0.1052M Na2S2O3 solution. A faded price label on the gallon bottle read $0.79. The density of the bleaching solution was 1.10 g/mL Calculate the number of moles of S2O32- ion required for the titration
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