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1. Sodium sulfate is a compound used in many soap or detergent products. Calculate the number of moles of solute needed to make 85.0 mL of 2.22 mol/L sodium sulfate solution.
2. Calcium nitrate is sometimes used in regenerable cold packs. Calculate the mass of solute needed to make 75.0 mL of 2.35 mol/L calcium nitrate solution.
Dropwise with stirring, and cool the reaction solution for 10 minutes in an ice-water bath to produce a suspension of the product.
The Law of Conservation of Mass states that matter is neither created nor destroyed in a chemical reaction. How do you explain iron nails getting heavier as they rust?
What mass of propane gas, C3H8, will occupy 860. mL at 880. mm Hg and 81.0°C?
Ethylene glycol,C2H4(OH)2, is a colorless liquid used as automobile antifreeze. If the density at 20 degree Celcius of a 4.028m solution of ethylene glycol in water is 1.0241g/mL, What is the molarity of the solution
Chloroform is an excellent solvent for extracting caffeine from water. KD = 9 for caffeine in chloroform-water at 25 degrees celecius. What weight of caffeine would be recovered from a solution of 4.0 g caffeine in 100 mL water by a single extract..
Explain the meanings of Vmax and Km. How do you get them from a graph of v vs. [S]. Draw a generic example and label appropriately. What are the differences between a competitive and non-competitive inhibition
The enzyme responsible for decarboxylation of branched chain amino acids is?
A 1.20 sample of dry ice is added to a 745 mL flask containing nitrogen gas at a temperature of 25.0 C and a pressure of 735mmHg .
Two kilograms of steam contained in a horizontal frictionless piston as well as cylinder initially at 250C and 4.81m3 are cooled isobarically until the volume decreases by 19.5%. Presume that heat is transferred at 190C.
what is the PH of cocaine hydrochloride that results from neutralizing a 25mL aliquot of 0.0372M cocaine solution
The vapor pressure of a liquid chloroform, CHCl3, is 400.0 torr at 24.1 c and 100.0 torr at -6.3C , what is Hvap of chloroform
An aqueous solution i s10.0% glucose by mass and has a density of 1.039g/ml at 20 degree Celsius. Calculate the freezing point and the normal boiling point of this solution
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