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Which solute would provide the shaper end point in a titration with 0.1 M HCl: use ka or kb values to answer this question. (a) 0.10 M NaOCl or 0.1 M hydroxylamine (b) 0.10 M NH3 or 0.10 M sodium phenolate (c) 0.1 M methylamine or 0.10 M hydroxylamine? (d) ).10 M methylamine or 0.10 M hydroxylamine
Express the pressure values numerically in atmospheres, separated by commas. Enter the partial pressure of methane first, then ethane, then propane.
Calculate the standard Helmholtz free energy of formation of delta fA of CH3OH(l) at 298K from the standard Gibbs free energy of formation and the assumption that H2 and O2 are ideal gases.
the air in the laboratory was measured with a barometer to be 7.20 x 10 squared mm Hg. what is the laboratory air pressure in atm.
Pure substances include: choose one below: elements only elements and compounds compounds and mixtures elements and mixtures all matter
How will the melting point of your semicarbazone derivative be affected if the derivative is not dry enough
One of the most common causes of inaccurate melting points is too rapid heating of the melting point apparatus near Tmelt. Under these circumstances, how will the observed melting point compare to the true melting point
Before the reaction, the volume of hte system was 6.60L. After the reaction, the volume of the system was 2.00L. Calculate the total internal energy change, Delta U, in kilojoules
A lab student analyzed a nickel-en complex for ethylenediamine, en, content. A 0.353g sample of the synthesized Ni-en complex was dissolved in about 50 mL of water and titrated with 0.165 M HCl (aq). Endpoint required 36.40 mL of the HCl (aq)
A sealed container contains 6 mol of hydrogen and 1 moles of nitrogen gas. If the total pressure in the container is 1.5 atm, what is the amount of pressure exerted by the hydrogen?
calculate number of moles of anhydrous compound recovered. c- calculate number of moles of water lost from the hydrated compound.d- what is the formula of the hydrate?
What is the activation energy for this reaction? a) 112 kJ/mol. b) 56 kJ/mol. c) 28 kJ/mol. d) 336 kJ/mol. e) 448 kJ/mol.
What is the heat change per mole of CaCl2 dissolved in water? Assume that all the heat is absorbed by the water. (c = 4.18 J/g C)
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