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If a 0.0200 M solution exhibits 50.0% transmittance, Explain what will be the percent transmittance for a 0.0400 M solution of the same substance measured at the same wavelength?
Calculate the total mass of the neutrons in 19/9F. Use 1.008665 amu as the mass of 1/0N(mass of a neutron). Express your answer in atomic mass units to 7 significant figures. Calculate the mass defect of 19/9F. Use 18.9984 amu as the actual mass o..
A buffer solution contains 0.386 M NH4Cl and 0.316 M NH3 (ammonia). Determine the pH change when 0.064 mol HBr is added to 1.00 L of the buffer
Write and equation that represents the reaction of 2% ethanolic PBP solution with 4-methylcyclohexene and name the product
Determine what volume of .1 M HBr is required to neutralize 50 ml of .140 M Barium hydroxide and determine the normality of a solution consisting of 10.51 mg of NaOH in 591 mL of solution
what was the delta t for the metal? c) how much heat flowed into the water? d) taking the specific heat of water to be 4.18J/gC, calculate the specific heat of the metal e) what is the approximate molar mass of the metal using the equation MM=25/S..
18.6 grams of a solute with molecular mass of 8940 grams are dissolved in enough water to make 1.00 dm? of solution at 25 àC. What is the osmotic pressure of the solution?
a second reaction has a standard Gibbs free energy of -55 kJ/mol. What is the ratio of their equilibrium constants at 300 K?
what is the pH of a buffer system in which the relevant pKa is 5.0 and there is an acid/base ration of 2
How many grams of oxygen would be used to completely react with 1290 grams of pentanone? then calculate the grams of water formed during this reaction
Determine the oxidation numbers of each elements in the following reaction, identify which of them are oxidized or reduced, if any: 2MnCO3(s)+O2(g) ---> 2MnO2(s)+2CO2(g)
What is the specific heat of lead if it takes 97.5J to raise the temperature of a 75.0g block by 10.1 degress celcius?
A chemistry lab experiment requires 25.2 g of silver nitrate. How many grams of a 15.5% by mass solution of silver nitrate should be used
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