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Prepare 250 ml of .02 M phosphate buffer in which [H2PO4]- = [HPO4]=. Compute the volume of 2M phosphoric acid and 1M NaOH required.
Over the years, the thermite reation [iron 3 oxide combining with aluminum metal] has been used for welding railroad rials, in incendiary bombs, and to ignite solid-fuel rocket motors.
choose the most reasonable substance that fits the description in each casea element with higher first ionization
A 355 mL can od diet soda contains 55 mg of sodium. How many gallons of diet soda must be consumed in order to ingest 1.0 lb of sodium
1 mol of ar initially at 298 k undergoes an adiabatic expansion against a pressure p external 0 from a volume of 20.0
question the nabr1-butanol and water are combined. sulfuric acid is added and the mixture is fefluxed. after reflux two
The vapor pressure of carbon tetrachloride, , is 0.354 atm and the vapor pressure of chloroform, is 0.526 atm at 316K . A solution is prepared from equal masses of these two compounds at this temperature
how many grams of methanol (CH3OH) is required to prepare a 0.112 m solution in 440 g of water? answer in units of g.
A cooling system is designed to maintain a refrigerator at -10 degrees C in a room at 25 degrees C. If 3x10^4 J of heat leaks into the refrigerator every minute, and the system works at 60% of it's maximum thermodynamic efficiency, what is the pow..
Azulene has an appreciable dipole moment. Write resonance structures for azulene that explain this dipole moment and that help explain its aromaticity.
an aqueous solution containing 4 mm of a weak acid ha has anabsorbance of 0.72 in a cuvet having an optical pathlength
The ionization constant of water at 1 Celcius is 1.259 x 10^-15. What is the Ph of pure water at this temperature. H2O H+(positive ion)(aq) + OH-(aq)
Gold forms a substitutional solid solution with silver. Compute the number of gold atoms per cubic centimeter for a silver-gold alloy that contains 44 wt% Au and 56 wt% Ag. The densities of pure gold and silver are 19.32 and 10.49 g/cm3, respectiv..
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