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You are given an unkown acid H2A, which has two acidic protons per molecule. A 0.954-gram sample of this acid is titrated with .509M NaOH; complete neutralization of the acid requires 36.04mL of bas
A kicker's extended leg is swung for 0.4 seconds in a counterclockwise direction while accelerating at 200 deg/s2. What is the angular velocity of the leg
the amusement park ride is going to rotate passengers around a vertical axis such that the supporting cables make a theta= 30 degree angle which vertical. Find the needed rate of rotation of the rid
How can you separate the three compounds used in a experiment by extraction if you begin the process (by mistake) with an aqueous NaOH-solution (instead of NaHCO3- solution)
A 890kg sports car collides into the rear end of a 2500kg SUV stopped at a red light. The bumpers lock, calculates the speed of the sports car at impact
what is the hyrdoxide-ion concentration of a solution if its hydronium-ion concentration is1x10^-5 mole liter
How many moles of oxygen are required for the complete combustion of 4.0 moles of decane to give CO2 and H2O
Determine the stopping potential as a function of wavelength at 433.9, 404.7, 365.0, 312.5, 253.5 nm.
Calculate the percentage or fraction of geologic time that is represented by recorded history. To make calculations easier, round the age of Earth to the nearest billion.
A 23-g bullet traveling 270m/s penetrates a 1.8kg block of wood and emerges cleanly at 195m/s. how fast does it move after the bullet emerges
Calcium nitrate and ammonium fluoride react to form calcium fluoride, dinitrogen monoxide, and water vapor.
If the contact time between bat and ball is 2.80×10?3s , calculate the average force between the ball and bat during contact
Your goal in laboratory is to launch a ball of mass m straight up so that it reaches exactly height h above the top of the launching tube. Find an expression for the acceleration that will earn you m
Amphetamines in urine can be confirmed by mass spectroscopy at a concentration of 500 ng/mL. Assuming a urine density of 1.025 g/mL, what is this concentration in parts per million
You take the elevator to the roof of a midtown skyscraper that is 100 meters high. How far from the side of the buliding will it land
What is the theoretical yield of ammonia in grams that can be prepared from 41.0 g of nitrogen and excess hydrogen
A 4 cm radius hose pumps out gasoline at a speed of 2 m/s in to an underground tank. what is the volume of the tank
A 25.0 g sample of garden compost was analyzed for chloride content. The sample was dissolved in water and the chloride was precipitated as silver chloride. 1.58 g of dried precipitate was obtained.
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.370mm wide. What is the width of the central bright fringe
Concentrations of flouride in drinking water grerater than 4.0 mg/L can cause mottled teeth in children. What is 4.0 mg/L expressed as molality
An ice cube sliding along the ground at 3 m/s goes off a ramp pointed straight up. What is the speed of the ice cube when it comes down, just before it hits the ground
Which concentration becomes smaller as the temperature is increased from 20 degrees celcius to 80 degrees celcius
"Two football players are moving toward each other in a straight line. Number 56 has a mass of 116 kg and a velocity of 3 m/s, Determine the velocity (magnitude and direction) of players, after the co
A certain dog whistle operates at 21.6 hz while another brand X operates at an unknown frequency. estimate the operating frequency of brand X
Naturally occuring sulfur consists of four isotopes: 95.0% 32s (31.97207amu); 33s (32.97146amu, 0.76%);