Question

6. How many moles are represented by 11.5 g of C2H5OH?

Answer 1

n C2H5OH = 0.2496 mol

Step-by-step explanation:

• moles (n) = mass / molecular weight

∴ m C2H5OH = 11.5 g

∴ Mw C2H5OH = (2)(12.011) + (6)(1.00794) + 15.9994 = 46.069 g/mol

⇒ n C2H5OH = (11.5 g)/(46.069 g/mol) = 0.2496 mol C2H5OH