The number of molecules of 3.6 grams of NaCl is 3.6 x 10²² molecules.
The molecular mass of NaCl is calculated as follows;
NaCl = 23 + 35.5 = 58.5 g/mol
The number of moles of 3.6 grams of NaCl is calculated as follows;
[tex]no \ of \ moles = \frac{reacting \ mass}{molar \ mass} \\\\no \ of \ moles = \frac{3.5}{58.5} = 0.0598 \ mol[/tex]
The number of molecules present in 0.0598 mole of NaCl is calculated as;
1 mole --------------- 6.02 x 10²³ molecules
0.0598 mole ------------------ ?
number of molecules = 0.0598 x 6.02 x 10²³
number of molecules = 3.6 x 10²² molecules
Thus, the number of molecules of 3.6 grams of NaCl is 3.6 x 10²² molecules.
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