Question

A student has a sample of isopropanol (C3H7OH) that has a mass of 78.6 g. The molar mass of isopropanol is 60.1 g/mol. How many moles of isopropanol are contained in this sample? 0.765 1.31 78.6 4,720

Answer 1

• moles of isopropanol are 1.31 moles.

Data given

• mass of isopropanol = 78.6 g
• molar mass of isopropanol = 60.1 g/mol

Solution

• mole = given mass ÷ molar mass
• mole = 78.6÷60.1 = 1.31 moles

Result

• The calculated moles of isopropanol are 1.31 moles.

Answer 2

78.6 g ( 1mol / 60.1g) = 1.31 mol isopropanol
so 1.31 would be your answer! I hope this helps!! ^^