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a solution is prepared with 385 g of an unknown compound in 1000 g cyclohexane the solution had a freezing point of 418
how many milliliters of a 0150 m magnesium hydroxide solution are needed to neutralize 1282 l of hydrochloric acid
how could you determine without tasting whether a container of a colorless liquid contained ethanol or ethanol and
the mass percent of an element in a compound is the mass of the element total mass of the elements atoms in the
a large cylinder of helium filled at 2000 lbin2 had a small orifice through which helium escaped into a space at the
the constant-pressure heat capacity of a sample of a perfect gas was found to vary with temperature according to the
on a dry day your body can accumulate static charge from walking across a carpet or from brushing your hair if your
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a sample of steam with a mass of 0551 and at a temperature of 100 condenses into an insulated container holding 420 of
the instruction booklet for your pressure cooker indicates that its highest setting is 111 you know that standard
a one kg non-stretch balloon fabric on the ground po 1 bar is attached to a 2 kg payload one kg of helium is placed
your are given a white substance that sublimes at 3000 degrees celsius the solid is a non conductor of electricity and
a gas at 250k and 15atm has a molar volume 12 smaller than calculated from the perfect gas law calculate a the
calculate the composition of the following two buffer solutions each buffer is to begin with 010m ethanolamine pka 950
use coulombs law f kq1 q2 d2 to calculate the electric force on an electron q - 16 times 10- 19c exerted by a single
about 70 million tons of paper are used per year in the us if the us population is 3016 million people how many
gallium-68 decays by positron emission with a half-life of 683 min how much 68ga remains from a 100 mg sample after 683
consider a reservoir with a diameter of 450 m and a depth of 10 m a how many liters of 010 m naf should be added to
a gas mixture consists of 320mg methane 175mg of argon and 225mg of neon the partial pressure of neon at 300k is 887kpa
chemical name formulahow many atoms of hydrogen and oxygen what other elements are in the compound for wood
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catalytic hydrogenation of naphthalene with one equivalent of h2 produces a single compound with molecular formula
one isotope of a metallic element has mass number 65 and 35 neutrons in the nucleusthe cation derived from the isotope
a 50-ml transfer pipet and a 200-ml volumetric flask to contain is used to make 0500 m and 0125 m solutions from a
suppose a reaction has the equilibrium constant k 17 x 10-8 at a particular temperature will there be a large or small