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  1. S

    Chemistry: Post your doubts here!

    Solubility of Ca(OH)2 is 1g/dm3 Mr of Ca(OH)2 is 74.1 Assume volume = 1dm3 only 1g of Ca(OH)2 able to dissolve in 1dm3 of water mol of 1g Ca(OH)2= mass/ molar mass = 1/74.1 conc = mol / volume = (1/74.1)/1 = 0.0135 mol/dm3
  2. S

    Mathematics: Post your doubts here!

  3. S

    Physics: Post your doubts here!

    Energy for TWO gamma ray photons E=mc^2 E=(2.4 x 10 ^-28 ) ( 3 x 10^8)^2 E= 2.16 x 10^-11 Energy for ONE gamma ray photon E/2 = 1.08 x 10^-11 J
  4. S

    Physics: Post your doubts here!

    P1v1=P2V2 (2.5 x 10^7)( 4 x 10^4 x 10^-6 ) = ( 1.85 x 10^5 ) V2 V2 = 5.41 m^3 ( volume of a super large balloon when all the air in cylinder is completely transferred to which is impossible. There must be some air left in the cylinder at the end ) the actual volume of super large ballon = 5.41...
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