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does the entropy of a system change when a a solid melts b a gas liquefies c a solid
a marble slide towards a 2nd marble at rest along the surface of frictionless table-top they behave as point masses and
an electromagnetic wave in vacuum has an electric field amplitude of 220 vm calculate the amplitude of the
calculate the hydrogen ion concentration in a solution of fruit juice having a ph of 425 a10 times 10-14 md25 times
measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8305decays per
calculate the h ion concentration in a 88 times 10-4 m caoh2 solution a88 times 10-4 md11 times 10-11 m b18 times 10-3
a microwave oven is powered by an electron tube called a magnetron which generates electromagnetic waves of frequency
the oh- concentration in a 25times10-3 m baoh2 solution is a40 times 10-12 md12 times 10-2 mb25 times 10-3 me0025 m c
a 75kg person goes down a straight slide inclined at 32 degrees above the horizontal the person is acted on by his
identify the conjugate base of hso4 - in the reaction h2po4- hso4- h3po4 so42- a h2po4- b h2so4 c h2o d h3po4 e
why does of2 have a single bond why not double bond wouldnt it be better to use a double bond and then o wouldnt have a
calculate the extent of reaction at gel point for a mixture of 08 moles of pentaerythritol 05 moles of ethylene glycol
the tension in a guitar string is increased by a factor of two by what factor does the wave velocity
after the sun exhausts its nuclear fuel its ultimate fate will be to collapse to a white dwarf state in this state it
refer to galvanic cell 0010 m zn2 in left cell and 15 m ag in right cell standard reduction potentials are as follows
the sun radiates energy at a rate of 3861026 w its radius is 70108m if the distance from the earth to the sun is
an engineer wishes to determine the specific heat of a new metal alloy a 0150-kg sample of the alloy is heated to
ethylene does not polymerize at ordinary pressures under conventional free radical processes why is
the earth is 1491011 meters from the sun if the solar radiation at the top of the earths atmosphere is 1340 wm2 what is
arrange the following solutions in order of decreasing freezing point 020 m mgcl2 015 m c6h6 010 m crbr3 015 m
krypton is a monatomic ideal gas suppose you have 40 moles of krypton at 293 k and 1 atm after absorbing 1830j of heat
at 699 k deltag -2325 kj for the reaction h2g i2g --gt 2hig calculate deltag for this reaction if the reagents are
in a head-on collision a car stops in 03s from a speed of 30 ms the driver has a mass of 80kg and is fortunately
fes 32o2g 32h2g --gt feoh3s at constant 25 degrees c and 1atm deltah for feoh3s are -82425 kjmol s for fes o2g h2g
1 how would the observed molar mass of the unknown liquid have been affected by the following circumstances would it be