Answer:
2.5 moles of ethanol
Explanation:
Density of ethanol= 0.789 g/mL
Volume of ethanol = 145 ml
Mass of ethanol = ?
Mass of ethanol = density × volume
= 114.41 g of ethanol
But number of moles = mass/ molar mass
Molar mass of ethanol = 46 g/ moles
Number of moles = 114.41g/46g/moles = 2.5 moles of ethanol
