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The rate constant for the second order reaction is .80 M s at 10 degrees C starting with a concentration of .86 M calculate the concentration of NOBr after 71 seconds.
2NOBr ----> 2NO + 2Br
Determine number of moles of oxygen molecules are in the cylinder and compute the mass of solid C 2 H 3 NaO 2 required mixing with 60.0mL of .125M C 2 H 4 O 2 to form a ph 4.20 buffer?
An aqueous solution of fotmic acid can be used to promote a ring-closing reaction
The first ionization energy of bismuth is Ei1=+703 KJ/mole. What is the longest possible wavelenghth of light that could ionize an atom of bismuth?
Acetylene gas (C2H2) burns with oxygen in an oxyacetylene torch to produce carbon dioxide, water vapor, and the great heat needed for welding metals. The heat of combustion of acetylene is 1259 kJ/mol.
The combustion of magnesium metal is described by the following equation. What mass of magnesium must be burned to produce 1.00 kJ of heat
A weather ballon is filled with helium to a volume of 305L at 28 degree celcius and 751 mmHg . The ballon ascends to and altitude where the pressure is 504 mmHg and temperature
A Cu/Cu2+ concentration cell has a voltage of 0.24 V at 25 Celcius. The concentration of Cu2+ in one of the half cells is 1.5 * 10-3 M. what is the concentration of Cu2+ in the other half cell?
How many milliliters of boiling water are required to dissolve 25g of phthalic acid? If the solution were cooled to 14oC, how many grams of phthalic acid would you recrystallize out?
If 12.0 g of O2 is required to inflate a balloon to a certain size at 27 OC what mass of O2 is required to inflate it to the same size (and pressure) at 5.0 oC.
1 calculate the final temperature of 63 ml of ethanol initially at 11 degc upon absorption of 527 j of heat. density of
A 58.0 mL solution of 0.500 M Cd(NO3)2 is prepared. What mass of NaOH is needed to precipitate the Cd2+ ions from this solution?
A semiconductor of n-type is know to have an electron concentration of 3 x 10^18 m ^3 if the electron drift velocity is 100 m/s in an electric field of 500 V/m, calculate the conductivity of this material.
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