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a give two instances each from metals as well as nonmetals to support these generalizationsb explain what connection is
when metal oxides react with water the oxygen usually ends up as the hydroxide ion separate from the metal in contrast
explain what mass of ammonium chloride must be added to 250 l of a 0165 m nh3 in order to gain a buffer with a ph of
balloon utilized for atm research has volume of 1 x 10 exponents of 6 presume balloon is filled with helium stp and
state a solution with density of 0935 gml contains 378 h2co 150 c2h5oh and 472 water by weight define is the molarity
two iron bolts of equal mass----one at 100c the other at 55 c----are placed in an insulated container assuming the heat
in a vollard titration a 05467g bromide containing unknown sample was dissolved and then 5000ml of 02000m agno3 was
define hair is made up of the protein keratin which is a polyamide that includes many alpha-amino acid residues hair is
define an attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers suppose
explain what observed rotation is expected when a 118 m solution of r-2-butanol is mixed with an equal volume of a 0590
an efficient treatment for some cancerous tumors involves irradiation with fast neutrons the neutrons from one
state the grignard reagent phenylmagnesium bromide reacts with hexanal to give a product with a new chiral centre would
define a gas originally at 27 degrees celsius and 100 atm pressure in a 39 liter flask is cooled at a constant pressure
state the solubility of l-aspartic acid an amino acid in water has been find out as follows all values are grams of
define a mixture of benzoic acid benzyl alcohol and biphenyl is spotted on a silica gel tlc plate and developed in a
1 one environmental problem receiving wide attention is the raise of carbon dioxide in the atmospherea compute the mass
compute the energy in joules needed to ionize a hydrogen atom when its electron is initially in the n 6 energy level
titanium f 694 x 10-19 j and silicon f 777 x 10-19 j surfaces are iradiated with uv radiation with a wavelength of
while the radio waves transmitted by a radio station have a frequency of 817 mhz define the wavelength of the waves in
a 368-g sample of water absorbs infrared radiation at 106x104 nm from a carbon dioxide laser assume all the absorbed
while a solution containing 10-5 m atp has a transmission of 0702 702 at 260 nm in a 1 cm cuvette compute a the
while a 0579g sample of a mixture of volatile hydrocarbons is burned in a bomb calorimeter with a heat capacity of 3389
radio waves travel at the speed of light 300x108 ms if you were to broadcast a question to an astronaut on the moon
compute the final temperature of a mixture of 2000 g of ice initially at -15 degrees celsius and 3690 g of water