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A spectrophotometer was calibrated with a 5.2×10^-4 M (in Cu) Cu-neocuproine solution. This calibration was carried out in a 1.00 cm cell, and yielded an absorbance of 0.215 AU. An unknown was then analyzed in this same spectrophotometer, but using a 2.50 cm cell. If the absorbance of the unknown was 0.222 AU, what is the Cu concentration?
NaBr + H2SO4 ---> HBr + NaHSO please descride the mechanism for SN2 reaction in the equation
The exothermic chemical reaction CO(g) + H2O(g) CO2(g) + H2(g) has Kc = 0.034 at 25°C. We currently have a flask containing all the components listed in this equation at equilibrium at 25°C. Subsequently, we will either (1) add some H2 to the flas..
0.25 g of sodium hydroxide (NaOH) pellets are dissolved in water to make 8.0 L of solution. What is the ph of this solution?
The volume of a gas is 2.80 L, measured at 1.00 atm. What is the pressure of the gas in mmHg if the volume is changed to 9.11 L
A sample of helium has a volume of 3 liters when the pressure is 500 torr. What volume does the gas occupy at 300 torr?
what concentration of substrate will give a velocity (v) of 62% of maximal velocity (Vmax)?
An unopened soda can has an aqueous CO2 concentration of 0.0506 m at 20 celcius. What is the pressure of CO2 gas in the can
A student determines the molar mass of methanol. She found that the equilibrium temperature of a mixture of ice and pure water was 0.4 degrees C on her thermometer
What is the electron-pushing mechanism for the aldol condensation reaction of benzaldehyde and acetone forming dibenzalacetone
Important information about Heat of Reaction, The combustion of butane produces heat according to the equation 2C4H10(g) + 13O2(g) --> 8CO2(g) + 10H2O(l) deltaHrxn= -5314kJ
What is the pH of a solution created by mixing 219 mL of a 1.64M NaHSO3 solution with 163 mL of a 1.81 M Na2S)3 solution
In the lower atmosphere, oxygen gas is converted to ozone gas by energy provided from lightening as shown in the reaction below and the value of the equilibrium constant for this reaction at 25C is Kc = 1.7 x 10^-56.Equation
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