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zinc carbonate hydroxide contains 5955 zinc by mass calculate the molecular weight molar mass of zinc carbonate
an unknown compound containing only carbon and hydrogen was burned in excess oxygen when 7714 grams of the compound was
what mass of cu and of n in grams are contained in 2507 g of sample that is 754 pure cuno32 by mass assume that the
the density of gold is 1931 gcm3 and the density of platinum is 2143 gcm3 if equal masses of gold and platinum are
write the reaction of the borohydride ion with water using curvy arrows to show electron movement to form one molecule
sodium borohydride reacts slowly with water and even more slowly with ethanol to generate h2 what observation would
consider a powder with 995 aucl3 particles and 05 agcl particles and each weighs 10 microg a if one weighed out 40 mg
a flask contains 300ml of 012m phosphate buffer that has a ph of 72 what volume of 02m hcl should be added to drop the
air bag in automobile inflate when sodium azide nan3 rapidly decomposes to its components elements 2nan3 s 2nas 3n2
assuming no heat loss by the system what will be the final temperature when 30 g of water at 100oc are mixed with 78 g
write condensed structural formulas of two esters and a carboxylic acid that each have molecular formula
in aqueous solution amphipathic molecules form aggregates of micelles or bilayers that maximize hydrophobic interaction
one prediction of global warming is the melting of global ice which may result in coastal flooding a criticism of this
when 0228 g of the hydrate znso4bullxh2o is heated 0128 grams of anhydrous znso4 remains what is the value of x in the
calculate the amount of heat liberated in kj from 316g of mercury when it cools from 748 celcius to 120
in an industrial process nitrogen is heated to 400kelvin at a constant volume of 1m3the gas enters a container at 300k
a small fraction of molecules break down to form positively charged ions and negatively charged ionsa substance that
how much water would be needed to completely dissolve 165 l of the gas at a pressure of 745 torr and a temperature of
what mass of water in grams is contained in 29 l of the vapor above this solution at 55 c the vapor pressure of pure
at 2000 degree c the equilibruim constant for the reaction 2no-gt n2o2 is kc24x103 the initial concentration of no is
at 373 k kp0416 for the equilibruim 2nobr-gt2nobr2 if the pressures of nobr and no are equal what is the equilibruim
for the reaction between h2 and no in the gaseous state experiments showed the following results when the initial
the balanced equation for the reaction of bromate ion with bromide in acidic solution is given by bro3- 5br- 6h -gt
a 1kg non-stretch balloon fabric can form a spherical balloon with a maximum radius of 5m it is attached to a 2kg
carbon monoxide competes with oxygen for binding sites on the transport protien hemoglobin co can be poisonous if