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5. Atoms and molecules
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Q18 of 29 Page 85

Write the valencies of Fe in FeCl2 and FeCl3

In FeCl2, the valency of Fe is + 2


In FeCl3, the valency of Fe is + 3


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17

Convert into mole

20g of water.

17

Convert into mole

22g of carbon dioxide.

19

Calculate the molar mass of Sulphuric acid (H2SO4) and glucose (C6H12O6)

20

Which has more number of atoms - 100g of sodium or 100g of iron? Justify your answer. (atomic mass of sodium = 23u, atomic mass of iron = 56u)

Questions · 29
5. Atoms and molecules
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