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A solution of acetic acid, CH3COOH, was left on alab shelf with an unknown concentration. The pH was found tobe 2.68. What is the concentration of the acetic acid?
An electron gun fires electrons into a magnetic field directed straight downward. Find the direction of the force exerted by the field on an electron for each of the following directions of the elec
The structure of these giant vessels are primarily composed of steel (p = 7.88 g/ cm^3), how do these boats stay aflot? Think about what else is "contained" in the boat's volume and how its density
A solution is made by taking 100.0 mL of 4.0 ×10-3 molar NaOH(aq) and mixing in 10.0 mL of4.0 × 10-2 molar HCl(aq). A small portionwas tested using thymol blue indicator, for whi
For small oscillations, approximate the differential equation (expand in Taylor series), neglecting terms higher than first order in x and its derivatives. Find the period of small oscillations.
If 0.0394 M aqueous KCl is produced stoichiometrically according to the balanced equation in a reaction solution with a total volume of1270 mL, what volume (L) of gaseous SO2 measured at STP is
How can this knowledge help you choose an appropriate instrument for certain measurements?
Write down the lagrangian in spherical coordinates, and generate the three differential equations of motion.
Suppose the 14C/12C ratio in plants athousand years ago was 10% higher than it is today. What effect, if any, would this have on the calculated age of an artifact found to be 1000 years old by
Radium-226 decays by alpha emission to radon-222. suppose that 25.0% of the energy given off by one gram of radium is converted to electrical energy.
This time, he connected two wires of the same diameter, 0.5 mm, but of different materials: One part is made of silver and 1 m long, the other is made of copper and 80 cm long. When you apply a pot
How do you know whether or not an element can be a cathoid or an anode and which cathoids and anodes can be combined. does it have something to do with the sign?
What is one simple way to get around this and get a reasonably accurate experimental value for the acceleration due to gravity?
The length of the major axis of hte track is 1.60 km and the length of the minor axis is 0.80 km. The circumference of the racetrack is 3.87 km. What would be the average velocity and average accele
A piano tuner use a 440 Hz tunning fork to toune a string that is currently vibrating at 445 Hz. How many beats per second does he hear? What other frequencies could produce the same sound effect?
If 930 mL of 0.0185 M aqueous Na2CO3 and 800 mL of 0.0413 M aqueous HCl are reacted, what volume (L) of gaseous CO2 measured at 0.5 atm pressure and 309 Kis produced.
The reflecting surfaces of two mirrors form a vertex with an angle of 130 degrees. If a ray of light strikes mirror 1 with an angle of incidence of 59 degrees, find the angle of reflection of the ra
A certain soft drink was analyzed and found to contain 0.080 M H+. Other ingredients of the drink include sugaror, in the diet form of the drink, an artificial sweetener.
When roads are icy, wet, or snowy, front-wheel drive cars (cars whose front wheels provide the force to accelerate the car forward) are generally more stable than rear-wheel drive cars (cars whose b
A blender (a kitchen appliance) has blades that rotate at 7500 rpm. When the motor is turned off, the blades stop in 3 s. Find how many complete rotations (including fractions thereof) do the blades t
An exothermic reaction A-->B, was carried out in dilute aqueous solution in a calorimeter. 80.0mL of deionized water was in the calorimeter and 0.24 mole of A is used.
A digital thermometer employs a thermistor as the temperature-sensing element. A thermistor is a kind of semiconductor and has a large negative temperature coefficient of resistivity
A floating ice block is pushed through a displacement d = (11 m) i - (11 m) j along a straight embankment by rushing water, which exerts a force F = (169 N) i - (160 N) j on the block. How much work
The reaction of phenylmagnesium bromide with benzophenone to formthe salt of triphenylmethanol is an example of nucleophilic addition; its reaction with ethyl benzoate to yield the same product invo
The 200-inch-diameter concave mirror of the Hale telescope on Mount Palomar has a focal length of 16.9 . An astronomer stands 21.2 in front of this mirror.