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a string with a mass per length of 200 gmm is stretched with a force of 120 n between two points that are 040 m apart
find the maximun number of moles of pbcl2 that can be dissolved in 100 l of 030 m naclaq at 25 degrees celsius given
calculate the amount of heat loss though a glass window made of a single pane of glass 0100 in thick if the temperature
using your data determine two values for deltah neutralization then calculate an average value the value should be
calculate the amount of heat lost by the hot water and the heat gained by the cold water the difference representing
a gas in a cylinder is held at a constant pressure of 220times105 pa and is cooled and compressed from 170m3 to 140m3
from each pair below select the molecule that will display stronger intermolecular dipole-dipole forces in a sample of
find the values of k for the equilibria established when aqueous solutions of the following are mixedhf and nh3h2co3
helium the second most abundant element in the universe can exist as a monatomic gas at a pressure of 11times105 pa a
use the following data to estimate the normal boiling point and the molar enthalpy of vaporization of leadtk
a small object of mass 290 g and charge -17 microc floats in a uniform electric field what is the magnitude and
the ksp for silver sulfate ag2so4 is 12 10-5 calculate the solubility of silver sulfate in each of the followinga
the atmosphere on mars is almost all carbon dioxide co2 and has a pressure of about 69times102 pa much less than that
a 349-g sample of an unknown metal initially at 2328oc is immersed in a 170-g sample of water specific heat 4184 j g-1
a circular pond of radius 12 m has a layer of ice 025 m thick on a spring day the temperature of the water below the
a spring-loaded toy gun is used to shoot a ball of mass straight up in the air as shown in the figure the spring has
a solution is prepared by mixing 200 ml of 0025 m bacl2 and 200 ml of 0075 m k2so4 what are the concentrations of
the nucleus of 8be which consists of 4 protons and 4 neutrons is very unstable and spontaneously breaks into two alpha
using the sandmeyer reaction as one step outline the steps necessary to prepare 4-bromotoluene 4-iodotoluene and
given that aprotic solvents are not practical for unimolecular processes little if any reaction occurs via a
a box of weight w 2 n accelerates down a rough plane that is inclined at an angle 30 degrees above the horizontal the
what is the maximum number of water molecules that could form h bonds one h bond per water molecule with 1-propanol to
a scientific instrument weighs 852 n in the earths surface and weighs 322 n in the surface of mercurywhat is the
a beaker with 190times10 2 ml of an acetic acid buffer with a ph of 5000 is sitting on a benchtop the total molarity of
a 18--tall object is 22 to the left of a lens with a focal length of 11 a second lens with a focal length of 48 is 54