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a sample of water at 230 c required an input of 169 x 104 j of heat to reach its boiling point 100 c what is the mass
urea is an organic compound widely used as a fertilizer its solubility in water allows it to be made into aqueous
how many moles of oxygen are formed when 586 g of kno3 decomposes according to the following reaction the molar mass of
construct a born haber cycle for the formation of the hypothetical compound nacl2 where the sodium ion has a 2 chargea
a block of ice of mass 370kg is placed against a horizontal spring that has force constant k 230nm and is compressed a
compute the kinetic energy in joules of an automobile of mass 1700kg traveling at a speed of 550kmhby what factor does
suppose you have a solution of acid hf with concentration of 0003m what would the concentration of h and f- be at
you need to make 500 ml of 100 mm potassium phosphate buffer at ph 75 you have the stock solutions of kh2po4 and k2hpo4
at the instant the traffic light turns green an automobile starts with a constant acceleration a of 21 ms2 at the same
born-haber cycles are called cycles because they form closed loops if any five of the six energy changes in the cycle
a galvanometer has a coil with a resistance of 75 a current of 156 ma causes full scale deflectiona calculate the
the solubility of a slaked lime caoh2 in water is 185g100ml what volume of 00400 m hcl is needed to neutralize 100ml of
compound ch32cchch3 contains 8563 g carbon per 1000 g compound calculate the mass g of a sample of ch32cchch3 if it
a uniform bar of length 18 m and mass 1 kg is attached to a wall with a hinge that exerts a horizontal force hx and a
runner a is initially 46 km west of a flagpole and is running with a constant velocity of 48 kmh due east runner b is
a 300-cm-diameter parallel-plate capacitor with a spacing of 0200mm is charged to 300v what is the total energy stored
calculate the energy change in kilojoules per mole when lithium atoms lose an electron to bromine atoms to form
a car is traveling at 500 mih on a horizontal highwaya if the coefficient of static friction between road and tires on
calculate the change in internal energy u2-u1 in kjkg of oxygen o2 when the temperature of the gas is increased from
an elevator is moving upward at 107 ms when it experiences an acceleration 030 ms2 downward over a distance of 071 m
helium gas is contained in a pressure vessel of volume v10m3 determine the mass in kg of helium in the tank if the
two astronauts initially at rest in space push on each other after the push the first one of mass m1 moves backward at
what will be the temperature difference needed in a hot-air balloon to lift 100 kg of mass assume that the volume of
in preparation for an experiment that you will do in your introductory nuclear physics lab you are shown the inside of