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one 20-year-old twin brother takes a space trip with a speed of 080c for 30 years according to a clock on the spaceship
what mass of sodium acetate nach3coo must be added to 1 l of 01 m acetic acid solution to make a buffer with a ph
a microwave oven with microwaves 122 cm long has a power output of 760 watts find the number of photons emitted per
a sample of coal is completely burned in a 100 l cylinder at a constant pressure of 110 atm and a temperature of 1000
a small plastic sphere with a charge of - 50 nc is near another small plastic sphere with a charge of - 12 nc if the
an open ended manometer containing mercury is connected to a container of gas what is the pressure of the enclosed gas
a buffer is initially prepared by adding 100 mls of 0500 m hol to 60 mls of 200 m naoi the mixture is brought to a
a certain 100 l buffer contains 0600 mol of a base and 0430 mol of the conjugate acid the ph is 830 what is the pka fo
a solenoid is 20 m long and with an inner radius of 30 cm and 1000 turns of wire when running the solenoid produces a
you have a 10 m long copper wire you want to make an n -turn current loop that generates a 10 mt magnetic field at the
a circular loop of wire has an area of 03 m2 it is tilted by 45deg with respect to a uniform 040 t magnetic field what
a buffer is prepared by mixing 02 mole of hcooh with 03 mole of nahcoo in a volume of 200 ml how many grams of naoh
a 100 molar solution of acetic acid is titrated with 200 molar solution naoh what is the ph at equivalence
a solid conducting sphere of radius a carries an excess charge of 6 microc this sphere is located at the center of a
an aqueous solution of sodium chloride in an electrolytic cell is subjected to a current of 250 amps for 150 minutes
on a day when the wind is blowing toward the south at 3 ms a runner jogs west at 4 ms using the vector addition
explain the coordination chemistry and chemical speciation utilized in the analysis of fluoride in water samples by
2 co no33 3 nh42 s co2 s3 6nh4 no3 how many nitrogen atoms are on each side of the
consider a capacitor c being discharged through a resistor r as shown in figure a the initial potential difference
calculate the osmotic pressure in torr of 600 l of an aqueous 0896 m solution at 300 deg c if the solute concerned is
how does the count rate vary with distance from a point source if the counter is moved twice the distance from the
a mass m 100g is released from rest from 10m above the horizontal level the diameter of the circular disk is 40cm
consider the following generic chemical equation a3bc what is the limiting reactant when each of the following amounts
a voltaic cell consists of a znzn2 half-cell and a nini2 half-cell at 25c the initial concentrations of ni2 and zn2
polyethylene is a synthetic polymer or plastic with many uses 141 g of a polyethylene sample was dissolved in enough