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When aqueous solutions of cobalt (II) chloride and sodium hydroxide are mixed what precipitate forms?
Prepare a standard of lidocaine in methanol with a final concentration of 1.00 mg/mL using the powder lidocaine/HCl. Show the calculations and explain how you take the salt form into account.
consider the isothermal expansion of 4.50 mol of an ideal gas at 450 k from an initial pressure of 12.0 bar to a final
The value of the euro was recently $1.38 u.s. and the price of 1 liter of gasoline in france is 1.35 euro
The increase in volume is due to the H2 gas created. 50 g of tin (Sn) is 0.421 moles. That is also the number of moles of H2 that are created. Use tha ideal gas law to compute the added volume due to that gas.
can you find out the name of the hydrate and its chemical formula if 5.00 g of fecl3 . xh20 are heated 2 grams of water
If 3.70 mol of ethane, C2H6, undergo combustion according to the unbalanced equation given below, how many moles of oxygen are required? C2H6 + O2-> CO2 + H2O
if a 5.0ml aliquot (portion) of the above solution was taken and diluted to 500.0mL. What is the concentration of this new solution
What is the molar mass of the unknown solution containing 1.01 g of unknown in 17.74 g biphenyle froze at 42 degrees C. Pure biphenyl freezes at 71.0C
If a reference solution is made acidic instead of basic, how would this change the composition of a precipitate and test for precipitating CO32-
Ethylene glycol, HOCH2CH2OH, is used as antifreeze. It is produced from ethylene oxide, C2H4O, by the following reaction. C2H4O(g) + H2O(l) ? HOCH2CH2OH(l)
What mass of solid sodium fluoride (molar mass = 41.99 g/mol) should be added to 1.0 L of 0.23M hydrofluoric acid to make a buffer with a pH of 2.94? (Ka of HF = 1.36 x 10-3)
Assume that the maximum number of ATP's is produced (38). At pH 7, and in the presence of excess Mg2+
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