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A 1.800 g sample of phenol C6H5OH was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/C degree. The temperature of the calorimeter plus contents increased from 21.36 C degree to 26.37 C degree.What is the heat of combustion per gram of phenol?
A mixture of aluminum and zinc weighing 1.67g was completely dissolved in acid to give 1.69L of hydrogen gas measure at STP. What is the weight of aluminum in the original mixture
The water level in a graduated cylinder initially at 216 rises to 287 after a piece of lead is submerged. What is the mass in grams of the lead?
A piece of indium with a mass of 16.6 g is submerged in 46.3 cm3 of water in a graduated cylinder. The water level increases to 48.6 cm3. The correct value for the density of indium from these data is
A geothermal system is initially more expensive to set up than a conventional heating and cooling system but the annual operating cost are much cheaper
it was important that the flask be completly dry before the unknown liquid was added so that water present would not vaporize when the flask was heated.atypical single drop of liquid water has a volume of approximately 0.05ml
A clear gelatinous precipitate of Bi(OH)3 forms in test tube A while no ppt. forms in test tube B. The appearances of test tubes A and B are due to the interplay between the ammonia and bismuth hydroxide equilibria.
Calculate Delta Ssurr and Delta Stotal at 70 degree. B) Does benzene boil at 70 degree and 1 atm pressure? Calculate the normal boiling point of benzene.
The proper concentration for an intravenous NaCl solution is 0.90 g NaCl per 100 mL of water (sometimes refered to as 0.90% m/v).
(a) How many moles of acetic anhydride were represented by the 6.00mL (density=1.08 g/mL) used in the synthesis (b) How many excess moles of acetic anhydride were used- over and above the amount needed to react with 3.00 g of salicylic acid
5.0ml of 12 M NH3 is added to 500ml of 0.050 M AgNO3. What concentration of silver ion will exist after equilibrium is established. {Kf for Ag(NH3)2 is 1.5 x 10^7
The reuseable booster rocket of the U.S space shuttle emplot a mixture of aluminum and ammonium perchlorate for fuel. A possible equation for this reaction is: 3Al(s)+ 3NH4ClO4(s) --> Al2O3(s) + AlCl3(s)+3NO3(g)+ H2O(g)
Calculate the value of Keq for the following equilibrium when [H2]=0.228M, [I2]=0.228M and [HI]=1.544 H2 + I2 -> 2HI
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