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In the first 13.0 of this reaction, the concentration of dropped from 0.500 to 0.460 . Calculate the average rate of the reaction in this time interval.
The bullet imbeds itself into the block, and they start to slide at 3.9 m/s. The coefficient of kinetic friction between the block and floor is .25. a.) How far does the block/bullet slide before it
Using activities, calculate the pH of a solution containing 0.010 M NaOH plus 0.012 M LiNO3. What would be the pH if you neglected activities?
If 18.9 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution, what is the molar concentration of the ammonia?
How many degrees of temperature rise will occur when a 25.0 g block of aluminum absorbs 10.0 kJ of heat? The specific heat of Al is 0.900 J/g·°C
A small ball of mass m is attached to a very light string of length L that is tied to a peg at point P. What is the magnitude of the horizontal velocity that must be applied to the ball so that it s
The equation for a van der Waals gas in (P + na^2/V^2)(V-nb)=nRT. 5 moles of the van der Waals gas nitrogen expands irreversible and isothermally from an initial volume of 40.0 liters at 310K, again
Find the tangential and centripetal acceleration at the top of the loop using the velocity from part A.
How many milliliters of concentrated hydrochloric acid solution (36.0% by mass, density = 1.18 ) are required to produce 11.0 of a solution that has a of 2.17?
A 2-kg mass at the end of a 1.5M rod is rotating in a vertical circle with a constant angular velocity of 8.5 radians/sec. What is the tension in the rod at 0 degrees, 90 degrees, and 270 degrees?
A reaction of 1 liter of chlorine gas (Cl2) with 3 liters of fluorine gas (F2) yields 2 liters of a gaseous product. All gas volumes are at the same temperature and pressure. What is the formula of
Luckily, Hal's sink, Eafin, lands on a padded spring which compresses it a distance of 25.0 cm. What is the constant for the spring that broke Eafin's fall?
Given that you are able to perform a diffusion experiment during a period of 30 days and that you are able to analyze a diffusion layer with thickness of order of 10-3 cm, what is a rough estimate o
How do you find the standard reduction potential for a half reaction when you are given two other half reactions of the same element but with different charges?
By how much does the potential energy of a(n) 15.0-kg child increase when the child climbs a normal staircase to the second floor?
There is 10g/L of carboxylic acid in boiling water. What is the minimum amount of boiling water needed to dissolve a 3.325 g sample?
Determine the work done to launch the motion of both the hammer and the bullet. (a) the hammer (b) the bullet
A 6500-kg satellite is in a circular earth orbit that has a radius of 3.4 x 107 m. A net external force must act on the satellite to make it change to a circular orbit that has a radius of 8.3 x 106 m
1.42 g H2 is allowed to react with 9.88g N2 , producing 2.19g NH3 What is the theoretical yield for this reaction under the given conditions? Express your answer numerically in grams.
In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 3.80 107 J at lift-off. What is the work done on the jet by the catapult?
Acetone, , and ethyl acetate, , are organic liquids often used as solvents. At 30, the vapor pressure of acetone is 285 and the vapor pressure of ethyl acetate is 118.
Isotonic saline solution, which has the same osomotic pressure as blood, can be prepared by dissolving 0.923 of in enough water to produce 100. of solution. What is the osmotic pressure of this sol
The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 6.00 m. (a) Find the work done by the pulling force.
A student is examining a bacterium under the microscope. The E. coli bacterial cell has a mass of = 1.00 (where a femtogram, , is ) and is swimming at a velocity of = 6.00 , with an uncertainty in t
A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 18.0 m. She pushes in a direction 30.0° below the horizontal. A 60.0-N frictional force opposes the motion of th