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25.5 mL of 0.152 M HCl(aq)will neutralise 25.0 mL of NaOH(aq)solution of unknown concentration. Calculate the concentration of the NaOH(aq)solution. Your answer should be in molL-1 (aka M). Please do not include units in your answer. Give your answer to 2 significant figures.
What is the pH of a buffer made by combining 0.025 moles potassium acetate with 0.015 moles acetic acid in 200 mL of water
1.2 mol of helium is mixed with 2.3mol of argon in a volume of 1.0L and a temperature of 25.0 degree C. Assuming that helium and argon are perfect gases, what is the pressure of the mixture?
An evacuated (empty) 276 mL glass bulb weighs 129.6375 g. Filled with an unknown gas, the bulb weighs 130.0318 g. Calculate the gas density in g/L.
From the following Information, calculate the standard change of enthalpy for the combustion of coal. Compound DeltaHf (kj/mol)
Describe the preparation of 200 mL of 1.00% (w/v) aqueous CuSO4, from a 0.218 M CuSO4 solution.
If 72.4 kJ of heat is supplied to a 842 g block of metal, the temperature of the metal increases by 9.0°C. Calculate the specific heat capacity of the metal in J/g·°C.
KBr solution added to this colorless solution will cause pale yellow AgBr to precipitate. List the species, Cl-, NH3, or Br- in order of decreasing stability of the compounds or complexes that they can form with silver and explain your reasons.
If the equilibrium concentrations of both Cl2(g) and Br2(g) are 0.0200 M in a closed container, what will be the partial pressure of BrCl
This is question is about the Purification Via Chromatography lab: 1.) Briefly discuss the interactions involved in a TLC plate (silica gell and solvent system; adsorption versus solubility). How does variation in polarity of a solvent system affe..
a sample of cacl2 of 11.8 grams is dissolved in water of 121 grams with both substances at the normal room
Identify the conjugate acid-base pairs in each of the following equations and state whether the equilibrium mixture contains mostly products or mostly reactants.
For the Reaction CO(g) + Cl2(g) -> COCl2(g), the rate constant increases 1500 times when the temperature rises from 150C to 250C. Calculate the activation energy, in kJ/mol, for this reaction. Assume frequency factor is constant for both temperatu..
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