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calculate the ph of a 017 m aqueous solution of ammonium chloride nh4cl at 25degc assume that kb for ammonia nh3 is
at what point during a titration of a weak acid with a strong base does the ph pka what ratio would cause ph gt pka
when the heart pumps blood into the aorta the pressure gradient-the difference between the blood pressure inside the
what is the volume required of a 02 m koh solution to reach the half equivalence point in titrating 25 ml of a 01 m
a rectangular box is to have a square base and a volume of 40 ft3 if the material for the base costs 030 per square
a bolt on an engine is to be tightened with a maximum torque of 75 nm if a wrench has a length of 030 m what is the
collinas italian cafeacute in houston texas advertises that carryout orders take about 25 minutes collinas website
what is the instantaneous power at a time of 000700 seconds dissipated by a 200 ohm resistor in a resonant ac circuit
a solid cylinder radius 0160 m height 0200 m has a mass of 146 kg this cylinder is floating in water then oil the
a 100 g aluminum calorimeter contains 250 g of water the two substances are in thermal equilibrium at 10degc two
at the time the switch is closed completing a simple lc circuit the capacitor has 34 j of stored energy and the
an rlc circuit has a reactance due to its capacitance of 19 kilo ohms a reactance due to its inductance of 10 kilo ohms
what is the ph of a buffer that is 050 m nh3 pkb 475 and 020 m nh4cl after 50 ml of 02 m hcl is added to the 1 l
you are an astronaut stranded in space your spacecraft lies about 200-m away you have a flashlight that can generate
73 mol of helium are in a 18 l cylinder the pressure gauge on the cylinder reads 67 psi what are a the temperature of
in black-and-white film developing excess agbr is removed from the film negative by lsquohypo an aqueous solution of
a bullet of mass mb 002 kg is moving with a speed of 100 ms when it collides with a rod of mass mr 5 kg and length l
q1 calculate ag present in a solution at equilibrium when concentrated nh3 is added to a 001m solution of agno3 to give
1 two manufacturing plants need 10x104 kg of al each week one plant produces the al from bauxite al2o3 and the other
a 20-kg uniform disk is at rest on a horizontal surface when a horizontal force of f400n is applied at the center of
r2 deaker and c phosphate are titrating 100 ml of momoprotic acid hac with 05m naoh solution the equivalent point was
calculate the rm ph at the equivalence point for titrating 0210 solutions of each of the following bases with 0210 mrm
a gun with muzzle velocity of 1200 ftsec is fired at an angle of eight degrees above the horizontal find the horizontal
what is wrong with measuring the voltage of cell containing only one solute component on each side feii of a given
in a photoelectric effect experiment a metal sample is illuminated by 100 mw of ultraviolet light of wavelength 240 nm