Answer:
6.67moles
Step-by-step explanation:
Rubbing alcohol has a formula as C3H8O.
Molar Mass of C3H8O = (3x12) + (8x1) + 16 = 36 + 8 + 16 = 60g/mol
From the question:
Mass of rubbing alcohol (C3H8O) = 400g
Number of mole = mass /molar Mass
Number of mole = 400/60
Number of mole = 6.67moles