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what is the ph of a buffer solution prepared from equal volumes of .25 m sol of a weak acid and .025 m sol of the salt of that weak acid. the acid has a pka of 4.82
Write the half-cell reaction for the oxidation. Write the half-cell reaction for the reduction. Write the balanced equation for the cell reaction. Keep substances in the order given in the original equation.
For the p-block elements, why are the d-orbitals not involved in the bonding process? But why are the d-orbitals involved in the bonding
how many moles of Cu2O can be produced from the reaction of 0.66 mol Cu with 0.40 mol O2?
three mole of aluminum metal react with a mole of solid iron(iii) oxide to produce two moles iron metal and a mole of solid aluminum oxide
determine the expression for the rate of the reation in terms of the change in concetration of each of the reatants and products.
Hardness in groundwater is due to the presence of metal ions, primarily Mg2 and Ca2 . Hardness is generally reported as ppm CaCO3 or mmol/L Ca2
The number of nuclei decaying in a sample of Gallium-68 decreased by a factor of 4 over a period of 136.6 minutes. What is the half life of this isotope
The temperature of a lead fishing weight rises from 15 oC to 45 oC as it absorbs 22.5 kJ of heat. What is the mass of the fishing weight in grams? Heat capacity of lead is 0.128 J/g oC.
To a 100 mL volumetric flask are added 1.00 mL volumes of three solutions: 0.0100 M AgNO3, 0.220 M NaBr, and 0.100 M NaCN. The mixture is diluted with deionized water to the mark and shaken vigorously.
How many grams of copper may be formed by the passage of 22,988 C through an electrolytic cell that contains an aqueous cuprous
Which reagent is the limiting reactant when 1.250 g Al(OH)3 and .750 g H2SO4 are allowed to react? How many moles and grams of Al2(SO4)3
Liquid octane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 9.1 g of octane is mixed with 22.7 g of oxygen.
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