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exactly 500 cubic centimeters of a gas at 1 atmosphere and 0 degrees celsius weighs 0581 grams the composition of the
a rubber ball filled with air has a diameter of 250 cm and a massof 0540 kg what force is required to hold the ball in
a person weighs 170lb assuming the density of the averagehuman body is about that of water estimate her bodys volume
a sealed cubical container 160 cm ona side contains three times avogadros number of molecules at atemperature of
a surveyor measures the distance across a straight river by thefollowing method starting directly across from a tree on
how much energy is required for an electron in a hydrogen atom to make a transition from the n2 state to the n3 state
a beach ball mioving with a speed of 127 ms rolls off apier and hits the water 075m from the end of the pier how high
determine the equilibrium constant of a weak acid if you titrate 2500 ml of the acid diluted with 5000 ml of water with
the human eye is able to detect as little as 235e-18 j of green light of wavelength 510 nm calculate the minimum number
to stop a car first you require a certain reaction timeto begin braking then the car slows down at a constant
an electron in a vacuum is first accelerated by a voltage of 21100 v and then enters a region in which there is a
a 15-cm-diameter cylinder of heliumgas is 20 cm long and at 20degc thepressure gauge reads 120 psia how many helium
plan a procedure to seperate 20 g of mixture into its components using a flow chart using solubility tests select the
two horizontal forces 241 n and181 n are exerted on a canoe if thethese forces are applied in the same directions find
butryic acid is responsible for the odor in rancid butter a solution of 25m butryic acid has a ph of 271 what is the ka
an aluminum wire has the same resistanceas a copper wire of the same length find the ratio of the aluminumwires
it takes a force of 850 n to compressthe spring of a toy popgun 0203 m toload a 0153 kg ball with what speed will the
formic acid hcooh is secreted by ants what is the ph of a 100l solution that contains 025 mole of hcooh and 025 mole of
consider the earth and a cloud layer 800m above the planet to bethe platesof a parallel-plate capacitoraif the cloud
high-intensity desk lamps are rated at 30 w but require only 13 v they contain a transformer that converts 125 v
an electric power station is producing 1 x 103 w of power that is to be sent to a small town located 11 km away eachof
a solution is made by mixing 690 l of 0027 m sncl4 and 291 l of 00043 m nacl solution what is the concentration of cl-
an ac generator has 70 rectangular loops on its armature each loopis 15 cm long and 8 cm wide the armature rotates at
an arrow with a mass of 80 g is fired at an angle of 30 degree tothe horizontal it strikes a target located 5 m above
when 955 g sample of solid sodium hydroxide dissolves in 1000 g of water in a coffee-cup calorimeter the temperature