In order to find the number of molecules, firstly we need to find the number of moles as the formula to find the number of molecules is:

Number of moles x Avogadro's number

To find the number of moles:

Number of moles = Mass (g) / Molar Mass

Number of moles = 3.46 / 36.5 = 0.095

Number of Molecules = 0.095 x 6.022 x 10^23
= 5.71 x 1022 HCl molecules

Answer:

=5.71x10²² HCI mocecules

Explanation:

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