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Beta carotene is the most significant of the A vitamins. Its molarmass (g/mol) can be determined by measuring the osmotic pressure generated by a given mass of beta carotene dissolved in the solvent chloroform. Compute the molar mass of beta carotene if 10.0ml of a solution containing 7.68mg of beta carotene has an osmotic pressure of 26.57mmHg at 25.0C.
the modulus of elasticity for a ceramic material having 5.5 volporosity is 319 gpa.a calculate the modulus of
It is then restored to its original state by the extraction of heat at constant pressure. Calculate w for each step and for the total process. What values for w would you calculate if the cycle were traversed in the opposite direction?
Based on the solubility rules, which one of these is insoluble in water?
The first order decomposition of N2O5 at 328 K has a rate constant of 1.70 × 1083 s81. If the initial concentration of N2O5 is 2.88 M, what is the concentration of N2O5 after 12.5 minutes
When CS2(g) (6.437 mol) and 51.91 grams of H2(g) in a 190.0 L reaction vessel at 983.0 K are allowed to come to equilibrium the mixture contains 1.444 mol of CH4(g). What concentration (mol/L) of CS2(g) reacted? CS2(g)+4H2(g) = CH4(g)+2H2S(g)
Describe how 100 mL of 0.01 M KIO3 primary standard can be prepared from solid potassium iodate. Write a step-by-step procedure that includes supporting calculations and any equipment/glassware that is required.
what are the 3 resonance structures of NO3- what is the shape
What is the total combined mass of carbon dioxide and water that is produced when an automobile gasoline tank holds 20 of gasoline. When the gasoline burns, 85 of oxygen is consumed and carbon dioxide and water are produced?
In the following exothermic chemical reaction, which stress will cause an equilibrium shift that favors the formation of more products. CH4 (g) + 2O2 (g) image from custom entry tool CO2 (g) + 2H2O (g)
To produce ferrocene one requires 2.33 g of C5H5 (65.0 g/mol) for every 1.00 g of Fe used (55.9 g/mol). What is the value of x in the formula: Fe*xC5H5
To obtain a 18.0% (w/v) solution of copper sulfate (CuSO4), M.W = 160) when only the crystalline salt is available (CuSO4 x 5H2O, M.W. = 250) what should the crystalline salt be weight to prepare 450.0 mL of solution
One way of solving systems of linear equations is by adding a multiple of one equation to the other. The multiplier for one equation is chosen so that one of the two variables will cancel out in the sum
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