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the radius of a typical human eardrum is about 40 mm find the energy per second received by the eardrum when it listens
a bat moving with speed of 325 ms and emitting sound of 350 khz approaches a moth at rest on a tree trunka what
draw the molecule by placing atoms on the grid and connecting them with bonds include all lone pairs of
a buffer solution of volume 100 ml is 0151 m na2hpo4aq and 0185 m kh2po4aq what is the change in ph resulting from the
how do you find the value of ka for nahso4 if you are given the concentration of h and the initial molar concentration
a lake has been acidified to a ph ofnbsp4046 if the lake has a volume ofnbsp107times105nbspcubic meters what mass in kg
as a reaction occurs the system loses 1150 j of heat to the surroundings a piston moves downward as the gases react to
when the temperature drops below freezing and ice and snow fall roads and sidewalks can become icy and hazardousnbspto
a buffered solution containing dissolved aniline c6h5nh2 and aniline hydrochloride c6h5nh3cl has a ph of 567a determine
one industrial method of producing bromine is to react seawater containing a low concentration of sodium bromide with
what is the ph of a 29times10-9 molar aqueous nitric acid solution hint the h3o due to the water ionization is not
in an aqueous solution of a weak acid ha the assumption is often made that haequilibriumnbsp hainitial this
calculate the theoretical yield in grams for the mononitration of acetanilide assuming that you begin with 05g of
please help me with these 2 chemistry questions thankscalculate the mole fraction of each component in a solution with
history assignmentinterview someone in your family preferably a grandparent or someone older or someone who is
write the net ionic equation for the reaction betweennbspacetic acidnbspandnbspsodium hydroxide do not include states
assignmentchoose one category origin of all things nature of god view of human nature view of good and evil etc from
propose a mechanism that might be employed by s marcescens in the regulation of
a solution is made by dissolving 206 g of cobaltii nitrate cono32 in enough water to make exactly 500 ml of solution
ethanol is often present in technical grade diethyl ether what effect would the use of technical grade diethyl ether
assignmentweve talked in class about the great american paradox on one hand you have the language of freedom most
in lab a student wasnbspgiven a hydrated version of nicl2nbspas thenbspunknown the initial mass of the hydrated salt
an aqueous solution ofnbspperchloric acidnbspis standardized by titration with anbsp0137nbspm solution ofnbspsodium
what is the molality of the solution if 56g of nacl is dissolved in 500ml of water density of water is
a pi bond vb theory or a double bond vsepr theory does not affect the geometry of a moleculenbspa what is hybridization