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What is the difference between molar mass and molecular mass?
1.00 mol of phosphorus reacted with excess fluorine: P4 + 6F2 -> 4PF3 Calculate the number of moles of PF3 produced, assuming the reaction went to completion
The nitrate concentration in an industrial effluent is determined using a nitrate ion selective electrode. Standards and samples are diluted 20-fold with 0.100 K2SO4 to maintain consatnt ionic strength.
When compound X undergoes ozonolysis, acetone, is the only product produced. Propose a structure for compound X.
The Ksp for Al(OH)3 is 2 x 10-32. At what pH will a 0.2 M Al3+ solution begin to show precipitation of Al(OH)3.
A solution is prepared by dissolving 6.00g of an unknown nonelectrolyte in enough water to make 1.00L of solution. The osmotic pressure of this solution is .750atm at 25.C. What is the molecular weight (g/mol) of the unknown solute
Draw arrows above each of the following covalent bonds to indicate the direction of the dipole-moment in the bond.
Using a spectrometer and beers law to determine % of copper in a brass sample: what equations are used to determine all.
The initial concentration of some weak acid, HA, in an aqueous solution is 0.2150 M, at equilibrium the concentration of HA becomes 0.0955 mol/L.
The half-life of a certain first-order reaction is 15 minutes. What fraction of the original reactant concentration will remain after 2.0 hours
Problem- Ub tge titration of 25.0 mL of 0.1 Fe2+ with 0.100 MCe4+, what will be the cell potential after the addition of 25.0 mL of Ce4+ solution
Question- An ideal helium has in equilibrium at temperature 800 K and pressure 1 bar is stored in a closed tank of volume 1 m^3. Find the mean and most probable kinetic enegeries of the atoms
You decide to use gel filtration. This works brilliantly and you determine that your protein is 80kDa at the same time. But wait! The gene that corresponds to HMD predicts a protein of only 38kDa. What are two potential causes of this discrepancy?
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