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a 70 kg man jumps 1m down onto a concrete walkway his downward motion stops in 00200 seconds if he forgets to bend his
a hockey puck is observed to be sliding along a flat frictionless surface at a speed of 49 mms there is no net force
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a ball is thrown upward with an initial velocity ofnbsp14nbspms using the approximate value ofnbspgnbsp 10 ms2nbspwhat
a light bulb is rated at 60 w when used with a 120 v power line if multiple 60 w light bulbs are to be connected
1 consider the structure of caffeine re-draw it here and answer the following questions from a structural
two solutions are made containing the same concentrations of solutes one solution is composed of phosphoric acid ad
a mixture of sulfuric acid and naoh has a ph of 19 which of the following is true about the mixture at equilibrium note
consider the following thermochemical equationsreaction deltarhdeg kj mol-1hfgnbsp hg fg 568h2gnbsp 2 hg 436hfgnbsp
a 617 g sample of solid kclo3nbspis decomposed by heating2 kclo3snbsprarr 2 kclsnbspnbsp3 o2ga what is the extent of
for the reaction below deltarhdeg -33079 kj mol-1 what is the standard enthalpy of formation of fes2s4 fes2s 11
a 013 m acidic solution has a ph of 3142 what is the percent ionization of this acid show
question 1following are some parent - daughter isotope pairs with their half lifeu-238nbspgoing to pb-206 t12nbsp 45 x
1 what mass in grams of potassium acetate kc2h3o2 must be added tonbsp132 ml of 0010 m acetic acid to form a buffer
a student found that there are 113 drops of glacial acetic acid in 200 ml calculate the number of drops of glacial
find h in an aqueous solution that is 050 m in nano2 and is 140 m in hno2 for hno2 aq ka 45
how many moles of naoh are required to make 500 ml of a 0300 m
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a 0003552 mol sample of an organic compound was burned in oxygen in a bomb calorimeter the temperature of the
for the reaction below the thermodynamic equilibrium constant isnbspknbsp 000192 at 35 degcnh4co2nh2s rarr 2 nh3g
the heat of combustion of ethanol c2h5oh is -1367 kjmol how much heat will be given off when 920 g of ethanol is
draw the molecule by placing atoms on the grid and connecting them with bonds include all lone pairs of
if a system has 35 x 102 kcal of work done to it and releases 500 x102 kj of heat into its surroundings what is the
part 1 calculate the acidity constant of benzoic acid inwaterat298kifgf forc6h5co-2aqis -2692kjmolandgf forc6h5coohaq
a buffer solution of volume 100 ml is 0151 m na2hpo4aq and 0185 m kh2po4aq what is the change in ph resulting from the