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if 2.325g of an unknown acid compound is made up to 200.0 mL with water. 10.00 mL of the resulting solution requires 15.43 mL of 0.1808 M NaOH. Caculate the molar mass of the unkown acid compound as
You have a 48.9 g sample of water at the temperature of -60.0 degrees celcius. How much energy is required to: heat the ice to 0 degrees celcius (specific heat: Cp of ice is 2.06 j/g degrees celcius)
at 700 celcius is 0.76 atm. Determine the initial pressure of carbon tetrachloride that will produce a total equilibrium pressure of 1.20 atm at 700 celcius.
The results of this experiment allow one to find . Find the ratio for this particle.
Calculate the final temperature when a 16.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 126 grams of water at 72.7 oC. Assume that there is no loss or gain of heat from the
Predict the amount of HCl and NaOH will be used based on the concentrations of weak acid/conjugate base or weak base/conjugate acid used to make each buffer.
Buffer capacity relates to the concentration of acid/conjugate base present. How is the relative buffer capacity to absorb H+ and OH- for the 1:1 and the 3:1 acidic and basic buffers?
The leg and cast in the figure below weigh 210 N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w1 weighs 125 N. Determine the weight w2 and the angle &al
Calculate the percentages of dissociated and undissociated forms present in the following solutions: A) 0.0010 M glycolic acid (HOCH2CO2H; pka = 3.83) at pH = 4.50
A car starts from rest moving w constant acceleration of 2.0 m/s2 for 10s, then travels w constant speed for another 10s, and slows to a stop w constant acceleraton of -2.0 m/s2. how far does it tra
Calculate the percentage of HSO4- that is ionized in this sample, given that the acid dissociation constant for the second stage of ionization of H2SO4 is 1.2E-2.
A copper-bottomed kettle, its bottom 24 cm in diameter and 3.0 mm thick, sits on a burner. The kettle holds boiling water, and energy flows into the water from the kettle bottom at 800 W. What is th
A titration to determine the Ksp of MgCO3 is done by adding 0.030M MgCl2 to 50.0mL of 0.010M Na2CO3. The titration requires 10.50mL to observe the first visible precipitate. Calculate the solubilit
What is most common chemical method for removing H3O+ ions in aqueous solution?
Write a mathematical equation for the rate of reaction as related to the concentration of oxalic acid (H2C2O4) and the rate of reaction to the concentration of permanganate (MnO4-).
Two compounds of nitrogen tetroxide(N2O4) and hydrazine(N2H4) are used as rocket fuels. When the two are mixed, they ignite and produce nitrogen gas and water. Find the limiting reactant, mass of N
How many joules of energy are necessary to heat the steam from 100 degrees celsius to 114 degrees celcius if the specific heat of steam is 2.01 j/g degrees celcius?
Consider a harmonic electromagnetic plane wave with angular frequency ω and propagation vector k=(kx,ky,kz) (i.e., propagating in an arbitrary direction). The electric field vector is E=(Ex,Ey
A cumbustion analysis was carried out on 1.621g of newly synthesize compound which was known to contain only carbon,hydrogen and oxygen. The masses of H20 and carbondioxide produced were 1.902g and
At time a grinding wheel has an angular velocity of 26.0 . It has a constant angular acceleration of 31.0 until a circuit breaker trips at time = 2.10 . From then on, the wheel turns through an angl
When the leak was discovered and repaired, the tank had lost 76.0 g of the gas. What was the pressure of the gas remaining in the tank at 25°C?
The heat of combustion of cyclobutane, C4H8, is 650.3 kcal/mol. Write a balanced equation for the complete combustion of cyclobutane.
Instructions for finding a buried treasure include the following: Go 660.4 paces at 255?, turn to 132? and walk 295 paces, then travel 420 paces at 195?. Find the magnitude of the resultant displac
The density of Gold is 19.31 g/cm3 and the density of Platinum is 21.43 g/cm3. Which graduated cylinder would have the greatest volume change? Explain.
A 27.0-g sample of water at 250. K is mixed with 47.0 g water at 310. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.