moles to grams, Chemistry

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determine the no of atom in 4.5g of k

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The number of 2p  electrons having spin quantum numbers= -1/2   are: (1) 6        (2) 0        (3) 2        (4) 3 Ans: 3

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Rutherford's α particle scattering experiment proved that atom has: (1) Electrons (2 )Neutron (3) Nucleus    (4 )Orbitals Ans: Nucleus

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A solution is made by dissolving30 g of a non-volatile solute in 90 g of water. It has a vapour pressure of 2.8 kPa at 298 K. At 298 K, vapour pressure of pure water is 3.64 kPa

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The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant 1.097 x 10 7 m -1 ) (1) 406 nm

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Acid, all alkalis are bases but all bases are not alkalies?

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Van der Waals repulsions Because severe van der Waals repulsions occur among the tert-butyl groups in compound A at normal bond lengths and angles, the only way for the molecu

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