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Concentrated sulfuric acid is 98% by mass H2SO4, with the remaining mass being water. What is the molar concentration (i.e., molarity) and the molal concentration (i.e., molality)?
To get an estimate of the number of beans in the jar you weigh six beans and obtain masses of 3.15, 3.12, 2.98, 3.14, 3.02, and 3.09 g . Then you weigh the jar with all the beans in it, and obtain a mass of 2082g . The empty jar has a mass of 6..
What compound could be added to a 0.10 M KC2H3O2 solution to make it an effective buffer. Also, write a balanced chemical reaction for the addition
to scale-forming water to convert calcium carbonate to calcium bicarbonate. write the chemical equation for this reaction.
Briefly explain the circumstances under which a mixed solvent recrystallization method would be used to recrystallize a given compound.
If a 220 piece of gold (density =19.32 ) is hammered into a sheet measuring 2.3*1.0 ft. , what is the average thickness of the sheet in meters?
Consider a rigid, insulated box containing 0.400 mol of He(g) at 30.0°C and 1.00 atm in one compartment and 0.600 mol of N2(g) at 100.0°C and 2.00 atm in the other compartment.
Determine the concentration of the HCL solution from the data for the standardization of the HCl with the Na2CO3 Na2CO3 had 0.0826 grams in 25ml of water Initial volume of HCl in the burette was 50ml Volume of HCl
Biphenyl is an organic compound that melts at 68.50?C and has a Kfp = 8.00?C/m. If 30.0 mg of lysine and 1.200g of biphenyl has an observed freezing point of 66.13?C, what is the molecular mass of lysine
Why was cold deionized water added to the reaction mixture rather than hot water, and what is the purpose of acetic acid?
Calculate the volume change upon mixing sufficient ethanol with 8.85mol of water to give this concentration. The densities of water
Draw the structures of the adduct of (i) 2 molecules of resorcinol with 1 molecule of furfural and (ii) of 3 molecules of resorcinol with 1 molecule of 5-hydroxymethylfurfural.
what was the mass (g) of molecular oxygen from the air that combined with the substance to produce the dense gas? B. What is the ratio of the weight of oxygen burned to the weight of the dense gas produced?
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