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Consider the following reaction and its corresponding thermodynamic data:
CO2 (s) → CO2 (g) Δ
Ho = 33.9 kJ/mol; Δ
So = 162.7 J/mol•K
What is the standard Gibbs Free-Energy change, ΔG (Celsius symbol) for this reaction at 25 oC?
Based on the Ksp values of CuS, PbS, MnS and HgS, which the the following ion pair will be the easiest to separete by fractional precipitation
On size-exclusion chromatogram you have three peaks 2.9, 3.5, and 4.8 min. Column dead volume is 12mL as well as flow rate 4 ml/min. Are your separation conditions fit for size-exclusion requirements. Define why.
Caffeine is made up of 49.5% C, 5.2% H, 16.5%O, and 28.9% N. A solution made up of 8.25g of caffeine and 100.0 of benzene (d=0.887g/ml) freezes at 3.03C.
Calculate the molar mass of a gas that has a density of 0.232 g/L at 156 oC and 222 torr. Use R = 0.0821 L-atm/mol-K for the value of the gas constant.
a solution of ammonia and water contains 4.90 x 10^25 water molecules. How many total hydrogen atoms are in this solution
You need to prepare 100.0 mL of a pH=4.00 buffer solution using 0.100 M benzoic acid (pKa = 4.20) and 0.200 M sodium benzoate. How much of each solution should be mixed to prepare this buffer
question if 9.5 grams of copper sulfate pentahydrate and 2 grams of iron are given calculate which reactant is the
The solubility of zinc oxalate is 7.9 x 10-3 (exponential 3)M at 18 degrees celsius.Calculate its Ksp. Find the pure molar solubility of BaCrO4(Ksp=2.1x10(-10 Exponentially ) in a) pure water and b) 1.5 x10(-3 exponentially) M Na2CrO4.
What is the maximum number of electrons that can be in a second electron shell (principal energy level)?
If the average speed of an oxygen molecule is 4.43 multiplied by 104 cm/s at 25°C, what is the average speed of a CO2 molecule at the same temperature?
Assume 6.9 g of sulfuric acid is mixed with 3.92g of sodium hydroxide. Compute the maximum mass of sodium sulfate that could be produced by the chemical reaction.
A 25 g sample of water revealed a mass percent for lead of 2.64%. Calculate the number of grams in lead
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