calculate the number of particles in each of the following :
1)48kg of sodium atom Na
2)8grms of O2 molecules

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Solution

1) molecular wt. of Na = 23 gram
23 g Na atom = 1 mole Na atom = 6.023 x 10²³Na atom
therefore 48 kg of sodium will contain = 6.023 x 10²³/ 23 * 48000 = 1.26 x 10²⁸ atoms of Na

2) 32 g O₂ = 1 mole of O2 molecule = 6.023 x 10²³O2 molecule
Therefore 8g of O₂ sample will contain = 6.023 x 10²³/ 32 * 8 = 1.55 x 10²³molecules of O₂

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calculate the number of particles in each of the following :1)48kg of sodium atom Na2)8grms of O2 molecules

calculate the number of particles in each of the following :
1)48kg of sodium atom Na
2)8grms of O2 molecules