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A volume of 60.0 mL of aqueous potassium hydroxide(KOH)was titrated against a standard solution of sulfuric acid(H2SO4). What was the molarity of the KOH solution if 24.7 mL of 1.50M H2SO4 was needed? The equation is: 2KOH(aq)+H2SO4(aq)-->K2SO4(aq)+2H2O(l)
The vapor pressure of dichloromethane at 0C is 134mmHg. The normal boiling point of dichloromethane is 40C. Calculate its molar heat of vaporization.
Sketch the experimental setup being sure to label the anode, cathode, direction of ion and electron flow, along with signs of each electrode.
Calculate the molar concentration of OH- ions in a 7.5×10^-2 M solution of ethylamine C2H5NH2(Kb = 6.4x10^-4).
Derive an expression for the compression factor of a gas that obeys the equation of state P(V - nb) = nRT
How many joules of heat are given off when 5 g of water cool from 75 degrees C to 25 degrees C?
You have 500 mL of a 5.0 M solution of nitric acid HNO3 (63.01 g /?mol) dissolved in water. How many grams of nitrogen does the solution contain.
Multiple choice questions in Nuclear reactions - make nuclear fission more efficient, which device is used in a nuclear reactor to slow the speed
what is the density of a block of marble that occupies 285 centimeters cubed and has a mass of 636 grams? answer in units of g/centimeters cubed.
When a 1.90 mg sample of methane burns in excess oxygen, how many grams of water and carbon dioxide are formed?
Consider the reaction NO + O3 → NO2 + O2 Which has a rate constant given by k = 1.8×10-12 e-1370/T cm3 molecules-1 s-1 .Use the following standard heats of formation.
The background section describes why you want the bleach to be far in excess of the dye. State how much greater the bleach should be to be considered in large excess. If the due is 1 x 10-5 M how much can the bleach be diluted before you no longer..
A flat 103-turn current-carrying loop is immersed in a uniform magnetic field. The area of the loop is 5.47 cm2 and the angle between its magnetic dipole moment
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