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nitrogen gas when combined with hydrogen gas forms ammonia gas according to the following equation n2g 3h2g 2nh3g
carbon-14 has an activity of 025 bq per gram of carbon for living organisms the half-life of carbon-14 is 5730 years if
explain how you would prepare 5000ml of a solution that is 0100m h2so4 from concentrated 180m h2so4 which is a liquid
an unknown substance has a mass of 0125 kg and an initial temperature of 775degc the substance is then dropped into a
what is the freezing point in of a solution prepared by dissolving 480 of in 110 of water the value of for water is 186
a particular reaction is spontaneous at 450k the enthalpy change for the reaction is 345 kj what can you conclude about
imagine you are pushing a 15 kg cart full of 25 kg of water up a 10 degree ramp if the coeff of friction is 02 what is
for a particular reaction it was found that the reaction rate was 16 times faster at 35oc than it was at 25oc it was
a he-ne laser produces light of wavelength 633 nm with intensity 109 103 wm2 over a beam of cross-sectional area 104
a somebody puts an expandable balloon on the opening of the bottle without any gas escaping the outside pressure is
human skin is most sensitive to ultraviolet light of approximate wavelength 300 nmfind the energy of a single photon of
for the following reaction cog 2h2g ch3ohga what is the value of the equilibrium constant of the reaction at
a large grinding wheel in the shape of a solid cylinder of radius 0330 m is free to rotate on a frictionless vertical
identify and descrine the structure and function of specialised cells of protection sensation and secretion in the
walking on a merry-go-round a child of mass stands at rest near the rim of a stationary merry-go-round of radius and
a the root mean square velocity of argon atoms is found to be 567x103 ms what is the temperature of the gasb given the
a uniform diving board of length 521 m and mass 504 kg is supported at two points one support is located l1 332 m from
a a sealed glass bottle of volume 450l contains 125g of no2 gas a measurement reveals that the temperature is 285
a 435 kg car moving at 200 ms hits from behind another car moving at 90 ms in the same direction if the second car has
a block of wood weighing 2n slides down a 370 inclined plane starting from rest and reaching 2 ms what is the kinetic
the blank solution used to calibrate the spectrophotometer is 100ml of 02m feno33 diluted to 250ml with 01m hno3 why is
a 250 kg child slides down a long slide in a playground she starts from rest at a height h1 of 2000 m when she is
ethylene gas rmc2 rmh4 reacts with water at high temperature to yield ethyl alcohol rmc2 rmh6 rmohow many grams of
a d 377 mm diameter wire carries an electric current of i 119 a when the electric field is e 660times10-2 vm along
at beginning of the work up stage of the lab procedure the two phase reaction mixture probably contains the