What was the molarity of the sodium carbonate solution
A 447 cm3 volume of Na2CO3 solution was warmed with an excess of sulfuric acid until all action ceased. A 5.0 L volume of dry CO2 gas measured at STP was given off and collected. What was the molarity of the sodium carbonate solution?
Expected delivery within 24 Hours
A sample of a compound has the following percentcomposition: 40% C, 6.67% H, and 53.3% O. Determine the empirical formula, andgiven a molecular mass of 180g, give the molecular formula.
Assume your are given a brain which weighs 1.45 kg andcontains 7.70e10 cells. If each cell was a cube, and had a densityof 1.0 g/mL
During a titration the following data were collected. A 20 mLportion of an unknown monoprotic acid solution was titrated with2.0 M KOH. It required 60 mL of the base to neutralize the sample.What is the molarity of the acid?
How much ice (in grams) would have to melt to lower the temperature of 353 mL of water from 26 degrees C to 6 degrees C? (assume the density of water is 1.0 g/mL.)
Why must the equipment for a Grignard reaction be very dry? In some reactions, simply rinsing with acetone prior to the reaction is satisfactory. Why might rinsing with acetone before starting the reaction not be suitable for this reaction?
Morphine (pKb = 5.80) is the active ingredient in opium. It is used as an analgesic that directly acts on the central nervous system to alleviate pain.
The density of aluminum is 2.70 g/cm3. A piece of foil that is 10.00 cm on each side has a mass of 440. mg. How thick is the piece of foil?
An aqueous solution of 0.150 g of the enzyme lysozymedissolved in 210 ml of solution has an osmotic pressure of 0.953torr at 25 oC. Calculate the molar mass oflysozyme.
If salt is used on icy roads in the winter to lower the freezing point of water to assist inmelting, in theory, what substance can be used to increase the boiling point of that same water?
In general, ionization energies increase across a period from left to right. Explain why the second ionization energy of Cr is higher, not lower, than that of Mn.
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!