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the compound sio2 does not exist as a discrete molecule while co2 does this can be explained becausea the si-o bond is
a container holds 20 mol of gas the total average kinetic energy of the gas molecules in the container is equal to the
a 40 turn coil of radius 54 cm rotates in a uniform magnetic field having a magnitude of 049 t if the coil carries a
1 how many grams of potassium acetate are needed to make the buffer solution ka of acetic acid is 178 x 10 -52 give the
at a certain location earth has a magnetic field of 060 10-4 t pointing 75deg below the horizontal in a north-south
a skater of mass 815 kg initially moves in a straight line at a speed of 530 ms the skater approaches a child of mass
as you bounce a tennis ball of mass 530 10-2 kg off a wall its velocity changes from vx 105 ms to vx -74 ms find the
what volume of 0200 m hcl must be added to 5000 ml of 0250 m nh3 to have a buffer with a ph of
a 1967 kennedy half-dollar has a mass of 1150 x 10-2 kg the coin is a mixture of silver and copper and in water weighs
calculate molar concentration of a 450 l solution that contains 355 g of dissolved sodium hydrogen carbonate why should
the side mirror on a car is convex and has a radius of curvature of 25 cm another car is following 20 m behind the
under conditions such that delta gprime and delta gzeroprime are equal to each other would the transfer of a phosphate
a camera lens has a focal length of 500 mm and an aperture setting of 400 what is the aperture diameter of this
a ray of light in air with a wavelength of 600 nm is incident on a liquid with an index of refraction of 15 the ray of
consider the coordination compound coclnh34h20so4 use the definition in the introduction to identify the a the ligands
the interior of a refrigerator has a volume of 0600 m3 the temperature inside the refrigerator in 282 k and the
a large balloon of mass 222 kg is filled with helium gas until its volume is 335 m3 assume the density of air is 129
if an x-ray beam of wavelength 14 times 10-10 m makes an angle of 30deg with a set of planes in a crystal causing first
an inductor l500 mh a capacitor c400 uf and a resistor r600 o are connected in series a 600 hz ac generator connected
a 120-v rms voltage at 600 hz is applied across an inductor capacitor and a 100- resistor in series if the maximum
a person in the air above the water in a swimming pool looks straight down into the water n 133 at a diamond ring that
1 mol of caoh2 is placed in 2 l of water and stirred at equilibrium at a certain temperature 00180 mol of caoh2
carbon disulfide n163 is poured into a container made of fused quartz n146 what is the critical angle for internal
in a tape recorder the magnetic tape moves at a constant linear speed of 56 cms to maintain this constant linear speed
calculate the amount of heat evolved in the complete oxidation of 817g of al at 25 degrees celcius and 1 atm pressure