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A volume of 40.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the solution if 19.2 mL of 1.50 M H2SO4 was neede
Consider resistors R1 and R2 connected in series E R1 R2 and in parallel E R1 R2 to a source of emf E that has no internal resistance. How does the power dissipated by the resistors
A turntable 1.90 m in diameter rotates at 78.0 rpm . Two speakers, each giving off sound of wavelength 30.6 cm, find the greatest beat frequency the listener
An analyst collects and melts 555.0 g of snow. a 100 g portion of the resulting water is made basic with ammonia, treated with cyanide and to mask other metal ions, and then extracted with 10.0 mL o
Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide, H2O2, can be titrated against a solution of potassium
a projectile is projected from the origin with a velocity of 45.0 m/s at an angle of 30.0 degrees above the horizontal. what is the range of the projectile
the velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees North of East. What is the velocity of the boat
trumpet creates a sound intensity level of 1.23 x 10^2 dB at a distance of 0.80 m. What is the sound intensity of a trumpet
When a 9.92-g sample of gaseous hydrogen bromide dissolves in 45.5 g of water in a coffee-cup calorimeter the temperature rises from 25.00 oC to 69.79 oC. Calculate H in kJ per mol of HBr for the s
When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. What is the speed of the second train
A stretched string fixed at each end has a mass of 33.0 g and a length of 8.00 m. Determine the positions of the nodes for the third harmonic
A volume of 40.0 of aqueous potassium hydroxide () was titrated against a standard solution of sulfuric acid (). What was the molarity of the solution if 19.2 of 1.50 was needed? The equation is 2K
A 5.0 deep swimming pool measures 30 by 16. What force does the water exert on the bottom of the pool
What is the final temperature in a squeezed cold pack that contains 50.0g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18 for the solution, an initial temperature of 27.0 C, a
A large parallel plate capacitor has plate separation of 0.90 cm and plate area of 355 cm2. estimate How much work is done on the capacitor
A potter's wheel, a thick stone disk of radius .297 m and mass 109 kg, is freely rotating at 57.5 rev/min. Find the effective coefficient of kinetic friction between the wheel and wet rag
At the unspecified temperature dinitrogentetraoxide partially decomposes according to the following equilibrium
After a shipwreck, a solid steel spoon lies at the bottom of the ocean, 5.65 below the surface. determine the fractional volume change in the spoon
An aluminum ring needs to be placed over a cylinder steel bar. At 10.00 degrees C, Find the temperature of the ring at which it fits over the bar
At a higher temperature, 373K, dinitrogentetraoxide partially decomposes according to the same equilibrium reaction but with slightly different results. The chemical equation is again
Estimate how many books can be shelved in a college library with 3400 of floor space. Assume 5 shelves high, having books on both sides
At a distance of 42 ft, an ionizing radiation source delivers 3.5 rem of radiation. How close could you get to the source and still have no biological effects
A car of mass 2800 kg collides with a truck of mass 4500 kg, and just after the collision the car and truck slide along, compute the velocity of the stuck-together car and truck
What is the complete and balanced chemical equation for. Lithium Sulfate+Lead(II) acetate ? Copper(II) nitrate+Sodium sulfide? Strontium nitrate+potassium iodide
Find the appropriate equilibrium constant (Kp) for the reaction below under the following conditions. 1/2 SNO2(s) + H2(g) <--> H2O(g) + 1/2 Sn(s)