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a 01236-g sample of an unknown monoprotic acid was dissolved in 258 ml of water and titrated with 00680 m naoh solution
some ions do not have a corresponding neutral atom that has the same e- config for each of the followings ions identify
the ph of a bicarbonate-carbonic acid buffer is 780 calculate the ratio of the concentration of carbonic acid h2co3 to
draw the condensed structural formula of benzyl acetate and circle the acetic acid part and the phenyl
calculate the ph after 0010 mol gaseous hcl is added to 2500 ml of each of the following buffered solutionsa 0050 m nh3
calculate the size of the quantum involved in the excitation of an electronic motion of frequency 10 x hz express the
the work function of an element is the energy required to remove an electron from the surface of the solid element the
1 a thin-walled plastic cigarette lighter was found to contain 42g of butane in an interior volume of 512ml calculate
a typical cup of tea is made by starting with six fluid ounces of cold water 177 ml how much heat in joules is required
a sample of natural gas at stp is 780 ch4 and 220 c2h6 by volume how much heat is produced from combustion of 160 l of
automobile air bags inflate during a crash or a sudden stop by the rapid generation of nitrogen gas from sodium azide
a piece of silver with mass 284 g has a heat capacity of 672 joc what is the specific heat of
a gas expands in volume from 267 ml to 849 ml at constant temperature calculate the work done in joules if the gas
1 assuming the pump and the air in it comprise the system what is the sign of w when you compress the airanswer a wgt0
under constant volume conditions the heat of combustion of benzoic acid c6h5cooh is -2638 kjg a 1640 g sample of
a sample of gas weighs 3490 g and has a volume of 9600 ml at 7350 torr and 360 degrees celsius what is the molar
write a balanced chemical equation with integer coefficients for the complete combustion of
calculate the pressure exerted by 100 mol of co2 in a 100 l vessel at 300 k assuming that the gas behaves ideally
calculate the ph at the equivalence point for the titration of 250 methylamine and 250 hcl the kb of methylamine is
the two isotopes of uranium 238u and 235u can be separated by effusion of the corresponding uf6 gases amp160what is the
were doing a lab and im asked to calculate the molar heat of vaporization of water the data i have is the temperature
a gas consists of 495 grams of oxygen and 495 grams of nitrogen and occupies a volume of 115 liter at a temperature of
in a calibration experiment a 104 millimole sample of na2co3 gave 087 millimoles of co2 gas if a 0387 g of pure na2co3
6- in the reaction 2kmno4 5cooh2 3h2so4 yields 10 co2 2mnso4 k2so4 8h2o is the manganese being oxidized reduced or