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Assume that you have 1,2,5,and 10 ml pipets and a 25mlvolumetric flask. Describe in detail how you would prepare asolution with a concentration near 0.10 M from a 0.650 M stocksolution. Calculate the final concentration of the dilutedsolution( it won't be exactly 0.10 M). It should be within 10% of0.10 M.
Calculate the mass of NaHCO3 that was used up in the reaction for each beaker. The molecular weight of NaHCO3 is 84.007 g/mole.
CsF has a lattice energy -744kJ/mol . Consider a hypothetical salt XY. X^3+ has the same radius of Cs^+ and Y^3- has the same radius as F^- . Estimate the lattice energy of XY
A sample of neon effuses from a container in 77 seconds. The same amount of an unknown noble gas requires 157 seconds. identify the gas.
earlier, lower-energy TS. Can model reaction coordinate as inverse parabolic potential well. What happens when we make X a better leaving group? Model by tilting entire plot forward. What happens when we make X a better leaving group?
Titanium occurs in the magnetic mineral ilmenite (FeTiO3), which is often found mixed up with sand. The ilmenite can be separated from the sand with magnets
It takes 24.0 min for the concentration of a reaction in a first- order reaction to drop from 0.35M to 0.25 at 25 degree celsious. How long will it take for the reaction to be 80% complete
a high pressure natural gas tank is at 3600 psi. the tank contains 4.98 mol of methane ch4 and 0.66 mol of ethane
When 36.5 mL of 0.585 M H2SO4 is added to 36.5 mL of 1.17 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate pH of this reaction.
You diluted the 1:2 dilution 1:3 and finally got a reading that fit onto your standard curve. Your absorbance was 0.450. The best fit line equation : y=0.3413x. What is the actual concentration your unknown protein
A sealed container holds 1.00 mole of helium and 2.00 moles of nitrogen at 30.0°C. When the total pressure of the mixture is 666 mm Hg, what is the partial pressure of the nitrogen? Provide an answer correct to 2 significant figures in mmHg.
a, The height of Niagra Falls is 51 meters. Calculate the Potential Energy of 1g of water at the top of the falls relative to the ground level. b, What would be the increase in temperature of the water if all Kinetic Energy were converted to heat.
A zero-order reaction has a constant rate of 3.20×10-4 . If after 60.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration?
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