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Calculate number of atoms in 1.8 g of ...

Calculate
number of atoms in 1.8 g of water.

Text Solution

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18 g of water `=6.022xx10^(23)` molecules
1g of water `=(6.022xx10^(23))/18` molecules
1.8 g of water `=(6.022xx10^(23))/(18)xx1.8` molecules
`=6.022xx10^(23)` molecules
1 molecules of `H_(2)O` has atoms=3
Number of atoms in 1.8 g of water
= No. of molecules `xx` 3
`=6.022xx10^(23)xx3`
`=1.8066xx10^(23)`
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