find the no. of hydrogen atom required to obtain 1.0 kg of hydrogen. take the mass of one hydrogen atom to be 1.0u . given: 1.0u=1.66×10^27 kg.
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I don't no
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Since we know the grams, 1kg or 1000g, we simply divide by the molar mass (1.0079g/mole) to get 992.2 moles of hydrogen. We then multiply by Avagadro's number, 6.0221415x10^23. This gives us 5.975x10^26 atoms in a 1kg sample of hydrogen.
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