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the earth receives approximately 2 x 1014 kjs of solar energy what mass of solar material is converted into energy each
cesium-137 has a half-life of 3017 years the first atomic explosion at trinity site in new mexico in 1945 generated
2kmno4s rarr k2mno4s mno2s o2gif 250 l of o2g is needed at 100 atm and 20degc what mass of kmno4s should be
what is an example of a specific transition metal solution including the oxidation state of the transition metal and
what are transition metals and what specifically happens to transition metals that results in solutions that give off
interpretation of reactions by ionic type equations aqueous solutions of the following substances or their mixtures
2 moles of a compound are allowed to react ina foam coffee cup that contains 197 grams of water the reaction caused the
a 200 ml sample of 0200 m hbr solution is titratedwith 0200 m naoh solution calculate the ph of the solution after the
a 315-nbspsample ofnbspnh4no3nbspis introduced intoan evacuated 226- lnbspflask and then heated to 245 cwhat is the
a compound contains only carbon hydrogen and oxygen combustion of 1068 mg of the compound yields 1548 mg co2nbspand 739
a 440 g sample of an unknown metal at 990nbspoc was placed in a constant-pressure calorimeter of negligible heat
consider the following reactionco h2 ltgt ch3oha reaction mixture in a 518nbsplnbspflask at a certain temperature
a student weighed out 174 grams of sodium hydroxide pellets and added them to 480 grams of water in a calorimeter
a sample of gas in a cylinder has an initial volume of 560 l and you have determined that it contains160 moles of gas
228 g of an unknown molecular solute is dissolved in 428 moles of 12-ethanediol c2h6o2 causing the freezing point of
202 g of an unknown molecular solute is dissolved in 565 moles of aniline c6h5nh2 causing the boiling point of aniline
the threshold wavelength for the photoelectric effect for silver is 262nm what is the work function for silver and what
why do the instructions call for using a saturated solution of naoh rather than one at lower concentration why can we
in the spring time a background ozone level of 290 ppbv was measured in edmonton convert the mixing ratio of 290 ppbv
vinegar is an aqueous solution of acetic acid ch3ooh a10 ml sample of a particular vinegar requires 3145 ml of 02560
silver nitrate has the molecular formula agno3 in a 1090 g sample of silver nitrate how much of that mass in g is from
for the equilibrium2ibrgi2gbr2gnbspkp85times10-3 at 150 cpart a if 27times10-2 atm of ibr is placed in a 20-l container
an aqueous solution has a normal boiling point of 1020degc what is the freezing point of this solution for
how do the colors seen by the naked eye compare to the emission spectra emitted by the
determine the molecular formula of a compound that contains 267 p 121 n and 612 cl and has a molar mass of 5800 gmol