hardness, Chemistry

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define hardness and its type?

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Why bromoethane are insoluble Because only two layers form, two of the three substances are mutually soluble. we know that water and bromoethane are insoluble-they form two lay

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how many moles of KOH are needed to exactly neutralize 500ml of 1.5M HCL solution?

Cu2+ will have the following electronic configuration, Cu 2+ will have the...

Cu 2+ will have the following electronic configuration: (1) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 , 3d 10 , (2) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 9 , 4s 1     (3) 1s 2 , 2s 2 ,

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