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In a study of ammonia production, an industrial chemist discovers that the compound decomposes to its elements N2 and H2 in a first order process. She collects the following data:
Time (s) 0 1.000 2.000
[NH3] (mol/L) 4.000 3.986 3.974
a) Use graphical methods to determine the rate constant.
b) What is the half-life for ammonia decomposition?
Calculate the pH of 1.00 L of a buffer that is 0.200 M in HC2H3O2 and 0.100 M in NaC2H3O2. The Ka of HC2H3O2 = 1.8E-5
How many molecules of acetylene (HCCH) react with 131 molecules of oxygen to produce carbon dioxide and water
Based upon 3 SnF2 (ag) + 2 K3PO4 (aq)> Sn3(PO4)s (s) + 6 KF (aq), a 10.000 gram sample of toothpaste containing stannous fluoride gives a 0.145 gram precipitate of stannous phosphate. What is the percentage of SnF2 in the toothpaste sample?
Using a solution containing 0.302 grams of an antibiotic has an osmotic pressure of 8.34 mmHg At 23.6°C, 0.500 L. calculate its molecular mass.
The two electrodes Cr/Cr+3 and Sn/Sn+2 are combined to afford a spontaneous electrochemical reaction. The standard reduction potentials (volts) for Cr+3 and Sn+2 are -0.74 and -0.14, respectively. Calculate E° for this reaction.
If 18.08 grams of ammonia (NH3) react, how many grams of water should theoretically be produced?
Initial temperature of rod = 100 °C; mass of H2O in calorimeter =130 g; cH2O = 4.184 °C g . (Assume the calorimeter has negligible heat capacity).
What is the concentration of a solution of lithium carbonate containing 0.01 mol in 750 mL of solution? Give your answer to two significant figures and include the units as mol L-1 ie 0.36 mol L-1
a solution of ethanol c2h5oh in water is prepared by dissolving 57.0 ml of ethanol density 0.79 gcm3 in enough water
The numerical value of Kc depends on the form of the balanced equation. D) When quoting Kc it is customary to omit units.
If E degree cell=-0.51V for the reaction below at 25 degree C, what is the value of the equilibrium constant at this temperature.
How much heat will be transferred when 0.50 mol of TiO2 reacts with 1.60 mol of HCL according to the following equation? TiO2(s)+4HCL(g)->TiCl4(I)+2H2O(g) ?H=-67 kJ
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