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Calculate the pH of a solution prepared by mixing 15.0mL of 10M NaOH and 30.0mL of 10.0M benzoic acid solution.(Benzoic acid is monoprotic; its dissociation constant is 6.5*10^-5)
A sample of solid ammonium sulfide (NH4)2S is placed in a closed bulb which is then filled with 0.0150 mol of inert HE gas. The pressure of the He at 25 degrees Celsius is 145 mmHg.
0.40 moles of a diprotic acid h2a is dissolved in 250 ml of water. the ka1 of this acid is 1.0 x 10e-5 and ka2 is 1.0 x
The equilibrium constant (Kc) for the reaction shown below is 4.17 10-34 at 25°C. 2 HCl(g) reverse reaction arrow H2(g) + Cl2(g) What is the equilibrium constant for the following reaction at the same temperature. H2(g) + Cl2(g) reverse reaction a..
Draw the product of the reaction between 1-butyne and NaNH2 in NH3, then D3O+. To add a deuterium atom, first explicitly add an H.
Find the pH of the equivalence points and the volume of 0.0372 M NaOH needed to reach it in titrations of
superheated steam at a pressure of 40 bar and a temperature of500degc is supplied to the turbine of a rankine cycle.a
Phosphorus donor atoms with a concentration of 10^16 cm^-3 are added to a pure sample of silicon. assume that the phosphorus atoms are distributed homogeneously throughout the silicon.
an unknown gas sample was dissolved in water at 25degc producing a solution with a concentration of 4.7 x 10-4 m at 522
Given the values of ?Hfo in kJ/mol and So in J/mol K given below, calculate the value of ?Go in kJ for the reaction at 298 K.: NH4Cl(s) => HCl(g) + NH3(g) ?Hfo (NH4Cl) = -312.4 ?Hfo (HCl(g)) = -91.5 ?Hfo (NH3) = -44.5 So NH4Cl(s) = 93.9 So HCl(g) ..
Teeth are made principally from the mineral hydroxyapatite, Ca5 (PO4)3OH, which can be dissolved in acidic solution such as that produced by bacteria in the mouth:
Explain PH and Biochemistry, Determine the weight in grams of sodium dihydrogen phosphate (M.W.138.01) and disodium hydrogen phosphate (M.W 141.98) needed to prepare 1L of a standard buffer at pH 7.00, with a total phosphate concentration of 0.100..
State the methods by which a radiation oncologist can administer these therapies. Additionally, state four major differences between the two modes of treatment.
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