Answer:
1 2 200 000 000 000 000 000 000 (20 zeros) molecules
Step-by-step explanation:
Molar mass of 1-butanol = 74.121 g/mol
number of moles = mass given / molar mass
where mass given = 1.5 g
number of mole = 1.5 g / (74.121g/mol ) = 0.0202 moles
number of moles = number of molecules / Avogadro's constant
where Avogadro's = 6.022 × 10²³ mol⁻¹
number of moles = 6.022 × 10²³ × 0.0202 moles = 1 2 200 000 000 000 000 000 000 (20 zeros) molecules