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the second is defined as a fractional part of a mean solar day express one second as a fraction of a mean solar day
for the reaction a-----products successive half-lives are observed to be 100 200 and 400 min for an experiment in which
2which of the following statements is true a gas particles are attracted to one another and therefore behave as grouped
1 for which of the following compounds is the term molecular mass better suited than the term formula mass i f2ii cao
when a chemist burns hydrogen according to the reaction below she finds that the reaction releases heat it is
a 1200 milk chocolate bar is found to contain 9200 of sugar what will be the amount of sugar in milligrams if the size
calculate the specific weight specific volume and density of one mole of methane at 100degf and 120 psi
a compound containing xenon and fluorine was prepared by shinning sunlight on a mixture of x2 0526 g and excess f2 gas
the purity of gold alloys is expressed in karats which is the mass fraction of gold multiplied by 24 pure gold is 24 kt
how many copper atoms are in a cube of copper metal measuring 135 cm on each edge the density of copper is 896
gold can be hammered into decorative gold leaf which is only 10-7 m thick if 1576 troy ounce of gold is hammered into
natural uranium consists almost entirely of 238u to operate a nuclear power reactor the fuel must be enriched in a
how many atoms are contained in a titanium sphere having a diameter of 3 mm the density of titanium is 4506
how many atoms are contained in a block of aluminum metal measuring 6 mm x 8 mm x 18 mm the density of aluminum is 27
the greek mathematician archimedes is credited with discovering how to verify the amount of pure gold in an irregularly
the gasoline tank of an automobile contains 83 kg of gasoline the gasoline combines with 3320 kg of oxygen what is the
sea-level atmospheric pressure is approximately 147 pounds per square inch from this fact we can deduce that a column
compute the number of electrons in a flake of pure gold valued at 059 assume that the price of gold is 11020troy oz 1
a sample of 15 g of nitrogen can be combined with 17142857 g of oxygen to form nitric oxide gas no what mass of oxygen
aluminum has many different isotopes what percentage of the mass of 26al is attributable to its
an unknown element has two naturally occurring isotopes isotope 1 has a mass of 1200 amu and an abundance of 40 isotope
lithium has two stable isotopes 6li and 7li if a sample is composed of 29 of the lighter isotope with the balance being
chlorine has two stable isotopes 35cl and 37cl if a sample of chlorine has an average molar mass of 3578764 gmol what