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how do substances have different physical and chemical properties than their component
q1 the concentration of pb in sample of wastewater is to be determined by using gravimetric analysis to a 10000 ml
12a mixture containing 39 moles of no and 088 moles of co2 was allowed to react in a flask at a certain temperature
a tree killed by being buried under volcanic ash was found to have a ratio of carbon-14 atoms to carbon-12 atoms of
use the thermodynamic data provided below to determine deltag in kjmol for the condensation of c3h7oh at 10293 degc
140 moles of gas are in a 800l tank at 209c calculate the difference in pressure between methane and an ideal gas
a closed flask of air 0250l contains 50 puffs of particles the pressure probe on the flask reads 93kpa a student
nitrogen gas reacts with hydrogen gas to form ammonianh3 how many miles of hydrogen gas does it take 9 moles of
a 2 l bottle containing only air is sealed at a temperature of 22 degrees celsius and a pressure of 0982 atm the
in a paper by bada protsch and schroeder nature 241394 1973 the rate of isomerization of isoleucine in fossilized
write the empirical formula for the molecular compound
a solution of calcium nitrate cano32 reacts with a solution of ammonium fluoride nh4f to form solid calcium fluoride
why are p-orbitals lobed instead of just bigger spheres around the
1 how is freezing point depression and heat of dissolution related to each other 2 what does the heat of dissolution
a current of 697 a in a solenoid of length 144 cm creates a 0379-t magnetic field at the center of the solenoid how
two long parallel wires carry currents of 331 a and 617 a the magnitude of the force per unit length acting on each
a cord is used to vertically lower an initially stationary block of mass m kg at a constant downward acceleration of g4
a puck of mass m 130 kg slides in a circle of radius r 230 cm on a frictionless table while attached to a hanging
a 65 kg block is on an incline with a coefficient of static friction of 050 the angle that the ramp makes with the
in a pickup game of dorm shuffleboard students crazed by final exams utilize a broom to propel a calculus book along
a barometer consists of an inverted tube in a pan of liquid that is typically mercurya which point has a higher
a typical winter electric bill might be for 2000 kilowatt-hours of energy each month say 30 days if you had an electric
a 40 kg kid wants to utilize a large plastic tub as a boat in a swimming pool the tub has dimensions 075 m long by 05 m
a person was dropped off a bridge the person weighs 588n and lands with a speed of 22 ms how high are the bridge and
1 a bicyclist moves 400 ft north in 80 s and then moves 300 ft east in 70 s the magnitude of the average velocity of