contestada

How many moles are in 640.00 grams of Glucose (C6H1206)?
Express your answer rounded to 2 decimal places

Respuesta :

Answer:

3.56 moles

Explanation:

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

[tex]n = \frac{m}{M} \\ [/tex]

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

[tex]M(C) = 12 , \: \: \: M( H_2) = 1 \: \: , \: \: M(O_2) = 16 \\ [/tex]

The molar mass of glucose is

[tex]M(C_6H_{12}O_6) = (12 \times 6) + 12 + (16 \times 6) \\ = 72 + 12 + 96 \\ \\ = 180 \: \: g/mol \: \: \: [/tex]

mass = 640 g

So we have

[tex]n = \frac{640}{180} = \frac{64}{18} = \frac{32}{9} \\ = 3.5555..[/tex]

We have the final answer as

3.56 moles to 2 decimal places

Hope this helps you