Question
Thu April 03, 2014

# i would like to know the names of crystalline solids that are isotropic in nature.also mention the conditions for it.thank u sir

Mon April 07, 2014

Whether a crystalline solid is anisotropic, or isotropic, depends on the way the atoms in the crystal are arranged. If the spacing and arrangement of the atoms in a crystal appears the same in each of the 3 planes (X, Y, and Z), the crystal is isotropic.

Plain table salt (sodium chloride) and FeS2, iron pyrite which has a lattice structure called "cubic", are examples of an isotropic crystal.

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# 1) a sample of hydrogen gas as volume 906 cm cube at 27 degree celsius. calculate the temperature at which it will occupy 500 cm cube of volume?   2) the density of the gas was found to be 3.43 gram per litre at 300 degree Kelvin and one atmosphere. calculate the molar mass when R = 0.0821 litre atmosphere per Kelvin per mole?   3) a 5 litre flask contain hundred gram of Sulphur trioxide and  one gram of helium at 20 degree Celsius. calculate the partial pressure of sulphur trioxide and helium and also total pressure?   4) how many molecules of ideal gas are there in 1 into 10 power minus 3 DM cube at STP?   5) calculate the total pressure in 10 litre cylinder which contain 0.4 gram of helium,1.6 gram of Oxygen and 1.4 gram of Nitrogen at 27 degree Celsius also calculate partial pressure of the helium gas in the cylinder. assume all the gas behave ideal?

Sun November 12, 2017

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