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when the sodium salt of an organic acid is strongly heated it yields sodium carbonate if the weight ratio of the sodium
a 357-g object is attached to a spring and executes simple harmonic motion with a period of 0220 s if the total energy
what are the h3o and the ph of an ammonia buffer that consists of 037 m ammonia and 024 m ammonium chloride kb of
a 330-g sample of an enzyme is used to make a 400-ml solution what is the molar mass of the enzyme if the osmotic
a viral preperation was inactivated in a chemical bath the inactivation process was found to be first order in virus
a copper rod has a length of 14 m and a cross-sectional area of 42 10-4 m2 one end of the rod is in contact with
assume the following parameters mass of the bottom steel disc 14678 kg mass of the upper steel disc 14795 kg mass of
two slits separated by a distance of d 015mm are located at a distance of d 590mm from a screen the screen is
the first order decomposition of n2o5 at 328 k has a rate constant of 170 times 1083 s81 if the initial concentration
a vertical spring stretches 42 cm when a 14-g object is hung from it the object is replaced with a block of mass 22 g
a step-down transformer turns ratio 16 is used with an electric train to reduce the voltage from the wall receptacle
nitrogen forms hydrides one of them a is acidic and contains 23 of hydrogen another b is a base containing 875 of
gold has a face-centered cubic arrangement with a unit cell edge length of 408 how many moles of gold fit in a sheet
a bat see the image below can detect very small objects such as an insect whose length is approximately equal to one
tension is maintained in a string the observed wave speed is 265 ms when the suspended mass is m 287 kg what is the
the total mass of carbon in living systems is estimated to be 75 x 1017 g the total mass of carbon on earth is
youre burning calories by weight lifting you lift a 65kg barbell 17m and repeat 10 timesa how much energy in do you
a uniform chain of length l and mass m is lying on a smooth table and one-third of its length is hanging vertically
a 20-m long steel wire cross-section 10 cm2 youngs modulus 20 acute 1011 nm2 is subjected to a load of 25 000 n how
estimate the change in the earthrsquos gravitational dipole moment with respect to the earthrsquos center if the polar
the sulfuric acid acts as a catalyst to remove one molecule of water from 2 molecules of ethanol what is the balanced
the surface of the sun is approximately at 5700 k and the temperature of the earthrsquos surface is approximately 280 k
the first-order principal maximum produced by a grating is located at an angle of 116 degrees what is the angle for
suppose 186 kg of water at 144c is mixed with 228 kg of water at 79c after equilibrium is reached the mixture has an
waves on a 10 meter rope travel at 20 ms you shake the rope back and forth until you get a standing wave with a single