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a stock solution of a biological T cell stimulator called PMA. The stock solution is 500 ?g/mL and you want to obtain a final concentration of 1?M. What volume of the stock solution do you need to make 10 milliliters of the 1 ?M solution? Also: What is the molar mass of PMA?
How much will the pH change? The pKa of acetic acid is 4.760.
Calculate the weight percent composition of the mixture, using the same assumptions as in part A.
If it is known that 41.6 grams of PURE ELEMENT THAT IS NOT DIATOMIC represents 1.30 moles of this element, what is the atomic mass of the element?
compute the partition coefficient for the compound between C 6 H 14 and H 2 O (Kphexane/water).
When 6.6 g solid NaOH is dissolved in 30.0 g of water in a coffee cup calorimeter, the temperature rises from 25.5 to 36.1. How much heat is produced by the dissolution process? the specific heat is 4.184
Determine the number of grams of sodium acetate and the amounts in mLs of 6.00M acetic acid that you would need to make 50.00mL of a sodium acetate/acetic acid buffer solution at the pH equal to 5.00 in order to make a final concentration of 0.05M..
how many moles of glucose C6H12O6 can be burned biologically when 10.0 mole of oxygen is available
The combustion of one mole of propane, C3H8 (Molar mass 44 g mol-1) releases 2230 kJ. How much heat is released by 6.60 g of propane?
The second virial coefficient of methane can be approximated by the empirical equation , where a = -0.1993 bar-1, b = 0.2002 bar-1, and c = 1131 K2 with 300 K
Assume the radius of a neutron to be approximately 1.0; times ;10^{ - 13} {rm cm}, and calculate the density of a neutron. [Hint: For a sphere V = (4/3)pi r^3.]
MgNH4PO4 • 6H2O loses H2O stepwise as it is heated. Between 40º and 60º C the monohydrate (MgNH4PO4 • H2O) is formed and above 100º C the anhydrous material (MgNH4PO4) is formed. What are the phosphorus percentages of the monohydrate and anhydrous..
Nitromethane has a relatively high boiling point of around 100 c. Which of the following intermolecular force is not present in pure liquid nitromethane and why.
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