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A 0.2150g sample is dissolved and treated with excess AgNO3. The precipitate is filtered, washed, dried as well as weighed. Product mass (AgCl) is 0.4587g. Explain what is the weight % of Cl in the original sample?
Calculate the biological standard Gibbs energies of reactions of the following reactions and half-reactions
Calculate the concentration of the Na2S2O3 solution if 30.70 mL of a 0.2210 M I2 solution react exactly with a 100.0 mL sample of the Na2S2O3 solution.
The half-life for the radioactive decay of [U]-238 is 4.5 billion years and is independent of initial concentration. Part A How long will it take for 20% of the [U]-238 atoms in a sample of [U]-238 to decay?
The value of delta E for a system that performs 213 kJ of work on its surroundings and loses 79 kJ of heat is kJ
What is the final temperature when 125 g of iron at 92.3 °C is dropped into 50.0 g of water at 27.7 °C? The specific heat of iron is 0.444 J g-1 °C-1 and the specific heat of water is 4.184 J g-1 °C-1.
what is the pressure in atmospheres in a container of gas connected to a mercury-filled open-end manometer if the level
What effect does the reduction of atmospheric pressure have on the boiling point. Can cyclohexane and toluene be separated if the external pressure is 350 mm Hg instead of 760mm Hg
Decide whether aqueous solutions of the salts a-h are acidic / basic / or neutral. For each ion that hydrolyzes write the hydrolysis equation. acidic/basic/neutral and hydrolysis equation
What would be the pH of a 3x10-4 M solution of acetic acid (CH3COOH) given its acid dissociation constant Ka = 10-4.75? What are the concentrations of CH3COOH and CH3COO-
A certain reaction has an activation energy of 68.0 and a frequency factor of A = 7.00×1012. What is the rate constant,k , of this reaction at 23.0
A 4.37 gram sample of a certain diatomic gas occupies a volume of 3.00 L at 1.00 atm and 45°C. What is the gas
Acetylene gas (C2H2) burns with oxygen in an oxyacetylene torch to produce carbon dioxide, water vapor, as well as the great heat needed for welding metals. The heat of combustion of acetylene
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