What is the mass of 1.20 10²³ molecules of CH₃OH? A)161g B)38.5g C)6.39g D)32.1g

Question

Quizplus · Accepted Answer

To find the mass of 1.20 x 10^23 molecules of CH3CH2OH, we need to first find the molar mass of CH3CH2OH.

C = 1 x 12.01 = 12.01
H = 6 x 1.01 = 6.06
O = 1 x 16.00 = 16.00

Molar mass of CH3CH2OH = 12.01 + 6.06 + 16.00 = 34.07 g/mol

Now, we can use the following formula to find the mass of 1.20 x 10^23 molecules:

Mass = (number of molecules) x (molar mass) / Avogadro's number

Mass = (1.20 x 10^23) x (34.07 g/mol) / 6.022 x 10^23 molecules/mol

Mass = 6.39 g, which is closest to choice C, 6.39g.

What Is the Mass of 1