Question

How many moles are in 640.00 grams of Glucose (C6H1206)?

Express your answer rounded to 2 decimal places

Answer 1

3.56 moles

Step-by-step explanation:

The number of moles of glucose can be found by using the formula

`n = (m)/(M) \\`

where

n is the number of moles

M is the molar mass

m is the mass of the substance

First we must find the molar mass of glucose

`M(C) = 12 , \: \: \: M( H_2) = 1 \: \: , \: \: M(O_2) = 16 \\`

The molar mass of glucose is

`M(C_6H_(12)O_6) = (12 * 6) + 12 + (16 * 6) \\ = 72 + 12 + 96 \\ \\ = 180 \: \: g/mol \: \: \:`

mass = 640 g

So we have

`n = (640)/(180) = (64)/(18) = (32)/(9) \\ = 3.5555..`

We have the final answer as

3.56 moles to 2 decimal places

Hope this helps you