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You tie a cord to a pail of water, and you swing the pail in a vertical circle of radius 0.600 . What minimum speed must you give the pail at the highest point of the circle if no water is to spill
Calculate the volume of 1M HCIO4 needed to lower the ph to 2.5; for a sample starting at ph 4, 7, and 10. Considering that there are 83 samples, about how much HCIO4 shoud you bring to the lab?
A 265 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30 degrees with respect to the horizontal. The coefficient of kinetic frictio
how many grams of cuso4 are there in 219 grams of an aqeous solution that is 20.2% by weight cuso4?
If the acceleration is constant, how much time elapses while the auto moves the 180 ft.
Which of the following statements is incorrect regarding a 320 g sample of gaseous sulfur dioxide at 0 °C and 760 mmHg pressure?
What are three obvious sources of error in experiments that use foam cups as calorimeters?
Peonin is a red pigment found in the petals of peony flowers why do you think peonin is bonded to two hexoses?what monosaccharides would be produced by acid-catalyzed hydrolysis of peonin ?
A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 230 J from 440 J. How high does she rise during this
What is the difference between VBT and VSEPR theory?
Calculate the mass in grams of 5.20 moles of ethylene glycol (C2H6O2)
Titrating this sample with a 0.005M NaOh required 7.3mL of NaOH solution to reach the endpoint. What is the pH of the lake?
An odorous gas emitted by a hot spring was found to diffuse 2.92 times slower than helium. What is the molar mass of the emitted gas?
What is the osmotic pressure, in atm, of a solution formed by dissolving 13.2 g of Al2(SO4)3 in 0.387 L of water at 34.1 oC? (R = 0.0821 L-atm/mol-K; 0 oC = 273 K)
Draw the two elimination products that could be formed by the reaction of 2-bromo-2-methylbutane with potassium hydroxide in ethanol at 78oC.
Then 25mL of distilled water was added to the beaker and 5 mL of .025 M Fe(NO3)3 solution was also added to make precisely 50 mL(total Volume). What is the molar concentration of the salicylic acid?
compound 1-iodododecane is a nonvolatile liquid with a density of 1.20g/ml. the density of mercury is 13.6g/ml. what do you predict for the height of a barometer column based on 1-iodododecane,when
Choose the two alkyl bromides and the hydrogenation method that must be used to synthesize these alkenes from acetylene.
A roller coaster car of mass 310 kg (including passengers) travels around a horizontal curve of radius 32 m. Its speed is 16 m/s. What is the magnitude and direction of the total force exerted on th
Two special steps in the experimental procedure are incorporated to reduce the loss of the calcium oxulate precipitate. Identify the steps in the procedure and the reason for each step?
The mass percent composition of the compound is 53.31% C, 11.19% H, and the rest is O. What is the molecular formula of the compound?
The heat of vaporization of water at 100 °C is 40.66 kJ/mol. Calculate the quantity of heat that is absorbed/released when 9.00 g of steam condenses to liquid water at 100 °C.
Two ants race across a table 65 cm long. One travels at 4.45 cm/s and the other at 3 cm/s. When the first one crosses the finish line, how far behind is the second one?
Describe at least three possible sources of error in a titration experiment like this and, for each, explain whether the error would result in a calculated molarity that is too high or too low.
The Henry's Law constant for carbon dioxide gas in water at 25 oC is 0.031 mol/L-atm. Calculate the solubility of carbon dioxide in water at 25 oC in moles/L if the partial pressure of carbon dioxid