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an aluminum cup contains 225 g of water and a 40 g copper stirrer all at 27degc a 470 g sample of silver at an initial
an external force moves a 54-kg box at a constant speed up a frictionless ramp the force acts in a direction parallel
an aluminum rod is 230 cm long at 20degc and has a mass of 350 g if 15000 j of energy is added to the rod by heat what
a student titrated 10ml aliquots of her unknown amino acid solution with standard 01521m naoh and with 00986m hcl
given that one mole of naoh reacts exactly with one mole of potassium hydrogen phthalate write the chemical reaction
potassium hydrogen phthalate has a molecular mass of 2042 gmole how many moles of potassium hydrogen phthalate are in a
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