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Has the industry made any recent advances in farming that have chemical foundations?
How many milliliters of 8.50×10-2 M;{rm NaOH} are required to titrate each of the following solutions to the equivalence point?
Calcium fluoride, CaF2, is a source of fluorine and is used to fluoridate drinking water. Calculate its molar mass to four significant figures.
Calculate the density of sulfur hexafluoride gas at 434 torr and 37°C.
What is molarity of NaOH solution if 26.0ml of 0.380 M H2So4 solution is required to neutralize a 25.0ml sample of the NaOH solution?
A catylst decreases the activation energy of a given reaction by exactly 15 KJ/mol. By what factor does the reaction rate increase at 25 degrees celcius when the catalyst is used? Assume that the Ar
What is the final temperature in a squeezed cold pack that contains 41.0 g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/g*C for the solution, an initial temperature of 26
Determine the mass of CaBr2 you would need to make 500 mL of a 1.2M solution.
What is the boiling point elevation when 43.5 g of the dye magenta is dissolved in 1650 g of ethanol? Kb for ethanol is 1.20 Cdegrees/m
The sledge moves a distance of 19.8 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope?
A 20 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after 23.5 mL, 24 mL, 26.5 mL, and 30 mL of acid have been added.
A 400g lemming (does anyone remember that old computer game?) waddles horizontally off a small 4.9m high cliff with a speed of 0.5ms-1.How far from the base of the cliff will the lemming land? What
Consider the dissociation of the tricrotic acid, H3Y. Use the values of K(a1), K(a2), K(a3), and K(w) to evaluate the equilibrium constants associated with each of the reactions shown below:
Consider the following equation: CO + 2 H2 → CH3OH ?H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2.
A 1300kg car travels north along Murdoch Drive at 65km/h. The car collides and becomes stuck to a 5000kg truck travelling west at along South Street at the intersection of South Street and Murdoch D
Why is the first step in an electrophilic aromatic bromination reaction so much more endothermic than the first step in an electrophilic addition to an alkene?
Sketch showing the acceleration of the canon ball over time if it was fired at 30°, 45° and 60° above the horizontal.
52.0 mL of a 1.70 M solution is diluted to a volume of 248 mL. A 124-mL portion of that solution is diluted using 169 mL of water. What is the final concentration?
Suppose you have equal volumes of saturated solution NaNO3, Na2SO4, and PbS. which solution would dissolve the most with PbSO4?
Light of wavelength 633 nm from a distant source is incident on a slit 0.750 mm wide, and the resulting diffraction pattern is observed on a screen 3.50 m away. What is the distance between the two
A solution is prepared by adding some solid BaCO3 to water and allowing the solid to come to equilibrium with the solution. What are the concentrations of Ba2+ and CO32- in the solution?
A space station, in the form of a wheel 135 m in diameter, rotates to provide an "artificial gravity" of 3.50 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of ro
The acid-dissociation constants of phosphoric acid (H3PO4) are Ka1 = 7.5 × 10-3, Ka2 = 6.2 × 10-8, 25) and Ka3 = 4.2 × 10-13 at 25.0 °C. What is the molar concentration of pho
Calculate the longest wavelength visible to the human eye. given 164kJ/mol
After a day of testing race cars, you decide to take your own 1500 kg car onto the test track. While moving down the track at 10.0 m/s, you uniformly accelerate to 27.0 m/s in 10 s. What is the aver