ok the 100 point question is... if i am walking to work at 6:00 and it takes me three hours to get there, and jimmy walks to the same place of work two hours later at 8:00 walking two mph faster than me, what time did i get to work?
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As you said Time taken by you to reach to the work is 3 hours And You start walking at 6:00 then definitely you will be there at 9:00
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1 mole of aluminium oxide (Al2O3) = 2 × 27 + 3 × 16 = 102g i.e., 102g of Al2O3 = 6.022 × 1023 molecules of Al2O3 Then, 0.051 g of Al2O3 contains =
6.022×1023 102
× 0.051 molecules
= 3.011 × 1020 molecules of Al2O3 The number of aluminium ions (Al3+) present in one molecules of aluminium oxide is 2. Therefore, The number of aluminium ions (Al3+) present in 3.11 × 1020 molecules (0.051g) of aluminium oxide (Al2O3) = 2 × 3.011 × 1020 = 6.022 × 1020
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