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A 0.2150g sample is dissolved and treated with excess AgNO3. The precipitate is filtered, washed, dried and weighed. Product mass (AgCl) is 0.4587g. What is the weight % of Cl in the original sample?
an unknown sample of n2 gave a current of 2.36microa in an electrochemical analysis. when 0.500 ml of solution
What is the value of at this temperature? 23.15 At this temperature the rate constant for the reverse reaction is 310. . What is for the reaction?
25mL of 0.1545M hydrochloric acid is added to a tablet portion. If it takes 6.38 mL of 0.1567 M sodium hydroxide to titrate the excess hydrochloric acid, how many moles of acid were neutralized by the tablet portion
If .40 mol of H2 and .15 mol of O2 were to react as completely as possible to produce H2O what mass of reactant remains?
What is the pH at the equivalence point when 20.0 mL of 0.20 M CH3NH2 is titrated with 0.40 M HCl? Kb = 4.4 × 10G4 for CH3NH2.
Find the de Broglie wavelength (in nm) associated with an electron that is moving with a velocity of 1900 km/s. The electron rest mass is 9.11 x 10-31kg.
but is lined with a calcite surface. Determine the concentrations of Ca2+, HCO3-, CO32-, and H2CO3. Examine the charge balance and comment on what else your neighbor may be doing to his pond.
A brown colored salt contains a cation from Group 3 (Fe, Mn, Ni). It has no reaction with concentrated H2SO4 and produces a soluble product with acidic AgNO3 and acidic BaCl2. This salt is not water soluble. What is the chemical formula for this s..
A 25.0 mL sample of 0.150M hydrocyanic acid is titrated with a 0.150M NaOH solution. What is the pH before any base is added? The Ka of hydrocyanic acid
aqueous solution of sucrose, C12H22O11(aq), which is used frequently in biological experiments. What is the value of x?
Changing the conditions of the reaction can alter the value of the change in free energy (?G). Sort the following conditions as to whether each would decrease the value of ?
HCL is a significant component of gastric juice. what is the concentration of chloride ion in gastric juice at pH=1.27?
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