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suppose you have a 905-gram sample of lead at 187oc the sample of lead losses 135 calories of heat the specific heat of
automobile airbags inflate when sodium azide nan3 decomposes explosively to form the elements na s and n2 g how many
if 500 ml of 020 m nacn is treated with 500 ml of an hocl soln to produce a resultant soln with ph 700 calculate mi for
derive dependence of initial velocity of the product p accumulation for the standard michaelis-menten reaction scheme
a compound is composed of element x and hydrogen analysis shows the compound to be 80 x by mass with three times as
how many ml of a 93 ww sulfuric acid having a specific gravity of 1820 should be used in preparing 2480 ml of 9 wv
a researcher added 206g of the salt sodium nitrate nan0subscript 3 to a cylinder containing water the cylinder diameter
how many ml of a 9 stock solution of a chemical are needed to prepare 113 ml of a solution containing 15 mg of the
how many grams sodium chloride nacl should be used in preparing 22 l of a solution containing 147 meql atomic wt of
a 1000 g piece of metal at an initial temperature of 105c is dropped into 1000 g of cold water initially at 21c energy
calculate the minimum concentration of cr3 that must be added to 0095 m naf in order to initiate a precipitate of
what are the coeffiecients of potassuim iodide lead ii acetate - lead ii iodide potasium acetate when properly
the ionization energies required to remove successive electrons from one mole of calcium atoms are 590 kjmol 4911 kjmol
the first order decay of a radionuclide was observed the initial activity was 000658 disintegrations per second per
a 655-g piece of lead at 91 degc was immersed into 500-g water at 250 degc the water temperature rose to 275 degc
calculate the ph and the poh of an aqueous solution that is 0025 m in hclaq and 0055 m in hbraq at
the zinc in a 1274g sample of foot powder was precipiated as znnh4po4 strong heating of the precipiate yielded 04089g
explain why in the base-catalyzed halogenation of acetone the second and third halogenations occur on the same carbon
how can the presense of the intramolecular hydrogen bonding in the single-deprotonated maleic acid lead to differences
when one mole of solid naoh is dissolved in one liter of solution 445 kj of heat are released how much heat is released
one of the reactions used in this lab actually occurs in two discrete steps shown below what is the overall net
a sample of copper sulfate pentahydrate cuso4 5h2o contains 3782 g of cu how many grams of oxygen are in this same
a student carried out a simple distillation on a compound known to boil at 124 degree c and reported an observed
a compound contains only carbon hydrogen and oxygen combustion of 730 mg of the compound yields 1068 mg of carbon