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Explain how much heat is absorbed when 2.055 moles of NH3 (g) reacts in the presence of excess O2(g) to produce NO(g) also H20 (l) according to the following chemical equation. 4NH3(g) + 5O2(g) -> 4NO(g)+ 6H2O(l) Change of heat = 1168 kJ
At MIT, there is a winter-time student tradition of taking a large quantity (1 kg) of sodium metal and tossing it into the Charles river, where it explodes, gets tossed back into the air, falls again and explodes etc. over and over again until all..
a metal objet with a mass of 19 g is heated to 96 degree celcieus then tranfered to a clorimeter containing 75 g of
a solution of 8.32g of paba in 150g of chloroform boiled at 62.62C. what is the molecular mass of paba?
Calculate the pH for the titration of 20mL of .75M formic acid (HCOOH) Ka(HCOOH) = 1.8e-4, with .2M KOH. a) Before any acid is added
A student takes 195. g of BaCl2, and reacts it according to the following equation: 3BaCl2 + Al2(SO4)3 → 3BaSO4 + 2AlCl3 How many moles of AlCl3 are formed?
the indicated ph value for the titration of 50.00 ml of .100 M benzoic acid (ka = 6.3 x 10^-5) with .0500 M KOH: ph = 4.20, 4.50.8.06, 11.50. write te reaction for KOH reacting with benzoic acid and the equilibrium for each pH value
The half-life of radon-222 is 3.8 days. How much of a 100 g sample is left after 15.2 days?
what are the influence of current economic crisis on student achievement in
A flask containing 450 mL of 0.47 M H2SO4 was accidentally knocked to the floor. How many grams of NaHCO3 do you need to put on the spill to neutralize the acid according to the following equation?
Unknown Q is determined to have a molecular formula of C6H12O. Q is not optically active, and passing it through a chiral column does not separate it into enantiomers.
Which of the following m/z values is the molecular ion for 2-butanone A. 15 B. 29 C. 43 D. 57 E. 72
Toluene is a liquid compound similar to benzene. Calculate the mole fraction of Toluene in a solution that contains 112 g Toluene and 221 g Benzene.
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