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Determine the numbers of moles of NaOH must be added to the buffer to increase its pH to 5.74 when a buffer composed of 0.50 mol acetic acid and 0.50 mol sodium acetate is diluted to a volume of 1.
Calculate the volume of 1.222M sodium hydroxide needed to react with 32.5ml of 0.569M sulfurous acid? Where one mole of sulfurous acid reacts with two moles of the hydroxide ion)
If this were to cause the buckling of 1 mile of straight track into the isosceles triangle (with track raised up into air at half-mile mark) then how high off ground would track be lifted at midpoin
Calculate the molarity of a solution of nitric acid if 0.216g of barium hydroxide is needed to neutralize 20.00 ml of nitric acid?
35.0 ml of a 1.75M solution of KNO3 is mixed with the 15.0ml of a 2.50M solution of KNO3. Calculate the molarity of the KNO3 after the solutions have been mixed?
Calculate the maximum amount of benzaldehyde impurity that could be in a sample of anisole (methoxybenzene) before it "failed" elemental analysis according to the JOC standards.
Determine the maximum amount of electrical work that may be generated by oxidizing 1 mole of hydrogen to water in a fuel cell. For combustion of hydrogen H2(g) + 1/2O2(g) -> H2O(l) the reaction e
Compute the amount of heat that will be given off by burning 1mole of hydrogen gas. For combustion of hydrogen H2(g) + 1/2O2(g) -> H2O(l) the reaction enthalpy is-286 kJ/mol and the reaction Gibbs
Determine the change in molar Gibbs free energy when the pressure is increased by 1bar. The molar volume of liquid water is 18 cm^3/mol at 1 bar and 298 K.
Write down an equation that shows the pH dependence on the chromate,CrO42 /dichromate,Cr2O72-, equilibrium system.
By calculating both of the distances PM and MQ, illustrate that PM=QM (This shows that M lies on perpendicular bisector of line segment PQ, but it doesn't show that M actually lies on PQ)
Determine the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n=4 to the n=1principal energy level. Where Hydrogen En= -2.18x1
Explain what would be the density of gaseous silane (SiH4) at 24 °C and 746mmHg? (mass/volume) Discuss in detail.
Determine the wave length of a neutron that has a velocity of 200. cm/s ( the mass of a neutron = 1.675 x 10-27kg.
Determine the mass of solution the student should use. A chemistry student requires 75 g of thiophene for an experiment. He has available 0.50 kg of a 29.3% w/w solution of thiophene in carbon tetr
School wishes to build the wheel-chair ramp, with the incline of 15 degrees, from ground to door. How much horizontal distance is required for ramp?
Half-life of iodine-123 is about 13 hours. You start with 1424 grams of iodine-123. Write the equation which gives amount of iodine-123 remaining after t hours.
The colony of bacteria grows exponentially. Colony starts with 3 bacteria, but 2 hours after beginning of experiment, it has grown to 780 bacteria. Write the formula for number of bacteria as the fu
You started with 400 grams of the radioactive element, and 7 days later it had decayed to 265 grams. Determine half-life of element?
For every rational function below: (i) state domain, (ii) find all x- and y- intercepts, (iii) find any horizontal, vertical and slant asymptotes, (iv) using the facts.
For each polynomial function below determine all the zeros (real and complex) and write function as the product of linear factors.
Determine the function which models number of mice m after t years. Evaluate mouse population after six years.
Mt. Rainier is situated approximately 56 km east and 40 km south of JBLM. If you are flying at the steady speed of 800 km/hr, how long after you depart JBLM will you be closest to Mt. Rainier?
If you are working in the shipping department and know that perimeter of box is 82". Also knowing that width is 1" longer than length. What would width and length be of box be?
The regular octagon is inscribed in the circle of radius 17.36 cm. Determine the length of one side of octagon, in cm, correct to two decimal places?