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density is mass per unit volume commonly the amount of matter in one cubic centimetre of the material what two
1 a 94 l sample of dry air is cooled from 145degc to -23degc while the pressure is maintained at 285 atm what is the
how many milliliters of 0100 m baoh2 solution are required to neutralize a solution containing 392 g
if ka is 185 x 10-5 for acetic acid what is the ph of the solution at the equivalence point during a titration of 500
what is the molarity of 500 ml of 0100 m acetic acid at the moment it is added to 500 ml of 0100 m naoh before the two
suppose it had been decided that the avogadro constant should be recalculated as the number of gold atoms in 19700g of
determine the quantity of unknown protein that has an absorbance of 0202 when a blank has an absorbance of 0086 the
a gas sample occupying a volume of 647ml at a pressure of 0971 atm is allowed to expand at constant temperature until
a sample of na2so4 s is dissolved in 225g of water at 298 k such that the solution is 025 m in na2so4 a temperature
under constant pressure conditions a sample of hydrogen gas initially at 13 degrees c and 80 l is cooled until its
glyceryl trimristrate and myristic acid are both white in color and have very close melting points suggest two ways to
a sample of gas originally occupies 2554l at 000 degrees c what is the new volume when it is heated to 2100 degrees c
alzarin yellow has a ph range of 101-121 what is its ka it is yellow at ph 10 and red at ph 12 what is the color of a
can someone explain the following subjects in a little detail enthalpy of formation kp and kc and finding like the mass
we are titrating 2142 ml of 03711 m hypobromous acid hobr ka 2000x109 with 05076 m lioh what is the ph at the
a calorimeter contains 220ml of water at 120 celcius when 230g of a substance with a molar mass of 560 gmol is added
how many moles of hydrogen gas occupy a volume of 559ml at standard temperature and
tungsten has a boy-centered cubic unit cell and an atomic radius of 141 pm what is the density of solid
air entering the lungs ends up in tiny sacs called alveoli it is from the alveoli that oxygen diffuses into the blood
you want to heat the air in your house with natural gas ch4assume your house has 275 m2 of floor area and that the
determine the molar mass of a gas with a density of 22108 gl at 8000 degrees c and exactly 1
if 500ml of ethanoldensity789gml initially at 70 celcius is mixed with 500ml of waterdensity10gml initially at 285
the elements of which groups in the periodic table release the most energy by gaining an electron the elements of which
calculate the density of helium in a helium balloon at 347 degrees c assume that the pressure inside the balloon is 119
calculate the mass in grams of hydrogen chloride produced when 505l of molecular hydrogen measured at stp reacts with