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the density of gold is 193 gcm3 a 34 mg piece of gold is hammered into a square that is 86 x 10-6 cm thick what is the
the full diameter of a wheel is 99 cm and its rotational inertia is 61kg m2 what is the minimum mass it could have how
the following data have been obtained for oxygen gas at 27315k calculate the best value of the gas constant r from them
what are the possible values of n and m the principal and angular momentum quantum numbers for an electron in a 5d
explain how and why the aqueous solubilitycwsat and vapor pressure pv for phenol differs when its pure natural state
compute the number of electrons in a flake of pure gold valued at 015 assume that the price of gold is 17620troy oz 1
a sample of 13 g of nitrogen can be combined with 14857143 g of oxygen to form nitric oxide gas no what mass of oxygen
a 0250-kg piece of aluminum that has a temperature of -158 degc is added to 14 kg of water that has a temperature of 26
if a hydrogen-like atom in the ground-state is excited with a wavelength of 39721nm how much energy has been absorbed
a string wrapped around a peg diameter200 cm along the axis of a top is pulled with a constant tension of 592 n
what volume of glacial aceic acid 18m and what weight of sodium acetate trihyddratech3coona3h20 are required to make
what is the molarity of the concentration hcl concentrated hcl is 372 by mass how did you find this value using the
a 10-m long plank with a mass of 15-kg is supported at each a 70 kg person stands on the plank between the supports if
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