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A calorimeter contains 29.0 of water at 14.0. When 1.80 of (a substance with a molar mass of 47.0 ) is added, it dissolves via the reaction
and the temperature of the solution increases to 27.0.Calculate the enthalpy change, , for this reaction per mole of .
Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 and 1.00 ] and that no heat is lost to the calorimeter itself, nor to the surroundings.
If 348 grams of K2SO4 (molar mass 174 grams) is dissolved in enough water to make 500 milliliters of solution, what are the concentrations of the potassium and sulfate ions.
Acid Mixture Problem, From a full 50-liter container of a 40% concentration of acid, x liters is removed and replaced with a 100% acid.
The balloon is blown up with air from a starting volume of 1 m3 to a volume of 3 m3. Find the final mass of air assuming it is at 25oC and the work done by the air
Compute w when 181 grams of iron (III) oxide (MM = 159.7 g/mol) combines with excess carbon(C)) to produce carbon dioxide(CO 2 ) gas at 359 K: express your answer in kilo joules
what will the concentration be after 9.00 minutes? Part B A zero-order reaction has a constant rate of 1.30×10^?4 M/s. If after 60.0 seconds the concentration has dropped to 8.00×10^?2 M, what was the initial concentration?
A glass bottle of normal capacity 250 cm^(3) is filled brim full of water at 20 degrees Celsius. If the bottle and contents are heated at 50 degrees Celsius, how much water spills over?
Explain Molecular and Empirical Formulas, Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H and 15.51% O by mass, and has a molar mass of 206g/mol.
The bacteria Azotobacter chroococcum grows aerobically and plays an important role in the soil nitrogen cycle. Azo can bind atmospheric nitrogen which is inaccessible to plants then release ammonia ions into the soil that plants can absorb
calculate the molality, molarity, and mol fraction of HF in a solution made by dissolving 5.0g of HF in 250g of water
the equivalence point i know you need to use [A-]= moles of HA/(vol water added+vol NaOH added) and believe moles of HA=5.39x10^-3
A 1.0 M Na2SO4 solution is slowly added to 10 mL of a solution that is .20 M in Ca^2+ and .30 M in Ag^+. Which compound will precipitate first: CaSO4 Ksp= 2.4 *10^-5 ,Ksp for Ag2SO4 is 1.5*10^-5. How much Na2SO4 solution must be added to initiate ..
An environmental chemist obtained a 200 mL sample of lake water believed to be cntaminated with a single monoprotic strong acid.
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