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If Stober Si nanoparticles are dispersed in water (assuming pH=7), how would you describe the charge on Si nanoparticle surfaces? Negatively charged, positively charged, or neutral? Why? Give a brief discussion about surface chemistry of Si nanoparticles.
If more NH4HS is added to a flask in which this equilibrium exists, how is the equilibrium affected? What is some additional NH3 is placed in the flask? What will happen to the pressure of NH3 if some H2S is removed from the flask?
Calcium hydride, CaH2, reacts with water to form hydrogen gas. CaH2(s) + 2 H2O(l) → Ca(OH)2(aq) + 2 H2(g)
Balance the following reaction: Manganese(V) sulfate reacts with chromium(III) sulfate and water to give manganese(II) sulfate, chromium(VI) oxide
An unidentified metal crystallizes in a body-centred cubic lattice with an edge length of 429 pm. The density of the metal is found to be 0.967 g/cm 3 . What is the identity of the metal
what is the pH of a solution of 125ml of 3.5 M of CH3COOH and 25ml of 1.25 M of NaOH ?
The rate constant are 0.039 L/mol-1*s-1for the forward reaction (CO2 + H2O ? H2CO3) and 23 s-1for the reverse reaction (H2CO3 ? CO2 + H2O). What is the order of the reverse reaction
The following diagram represents a reaction shown going to completion. Letting A = red spheres and B = blue spheres, write a balanced equation for the reaction. Write the equilibrium- constant expression for the reaction.
the normal boiling point of liquid bromine is 58.2degc. at 9.3degc the equilibrium vapor pressure of liquid bromine is
Calculate the theoretical yield of Nylon 6,6. State the limiting Reagent. Is Hydroquinone sterically hindered
A reaction mixture initially contains 0.86 M NO and 0.86 M S03. Determine the equiibrium pressure of NO2 if Kc for the reaction at this temperature is 0.0118.
If 37.3 g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O, how many grams of H2O are produced in this reaction.
What would be the best indicator for the titration of 0.20 M CH3COOH titrated with 0.2 M NaOH? (Ka for acetic acid = 1.8 X 10-5) The pH ranges for the color change of some common acid base indicators are given below
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