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what is the molarity of a 50 by mass naoh how did you find this value using this molarity show that 13ml of 50 by mass
you wish to prepare a 05 liter solution of an acetate buffer having a ph of 50 and a concentration of 1m the pka of
the lenses in the glasses have a focal length of -443 cm and are worn 20 cm from the eyes with the glasses the person
what weight of solid glycine pk124 and pk296 and what volume of 10 m hcl are required to make 100ml of 3 m buffer ph 24
describe the preparation of one liter of 010 m ammonium cholride buffer ph9 starting with solid ammonium cholride pk926
suppose 79kw is to be transmitted over two 0105ohms lines estimate how much power is saved if the voltage is stepped up
chlorine has two stable isotopes 35cl and 37cl if a sample of chlorine has an average molar mass of 36127139 gmol what
a mass of 1 kg of r-134a is contained in a rigid glass vessel of volume v 005 m3 the system is initially at t1 30ca
an experimenter has determined the relative abundance fractional abundance of the five naturally occurring isotopes of
four identical 2kg point masses are fixed at the corners of a massless rectangle of length 20cm and width 15cm the
a physics student wants to build a spring gun that when aimed horizontally will give a 300- g ball an initial
a compound is produced when 608g of nitrogen combine completely with 1392 g oxygen what is this
a 50 w light bulb shines through two polarizers after having passed through the first polarizer the electric field
a projectile is shot upward off a 475 m high cliff with a speed of 65ms at an angle of 48 with respect to the
one mole of a dilute gas initially has a pressure equal to 100 atm and a volume equal to 260 l and an internal energy
100ml of a 04 moll acetic acid is mixed with 20ml of a 18 moll naoh calculate the ph of this buffer pka acetic acid
gas is confined in a tank at a pressure of 123 atm and a temperature of 295degc if two-thirds of the gas is withdrawn
a pendulum consists of a uniform disk with radius 10 cm and mass 400 g attached to a uniform rod with length 500 mm and
element z has two natural isotopes z-79 78918 amu and z-81 80916 amu calculate the atomic mass of element z given the
a 75 kg solid sphere with a 19 cm radius is suspended by a vertical wire attached to the ceiling of a room a torque of
a 1000 ml aliquot of a dibasic compound with kb1 110-4 and kb2 110-8 was titrated with 100 m hcl and a base
an oscillating block - spring system has a mechanical energy of 170 j and amplitude of 100 cm and a maximum speed of 11
a large disk of mass md and radius r is spinning in a horizontal plane about a vertical axis through its center with a
a 900 cm pendulum is released from a small angle after 109 oscillations the amplitude is one half of its original value