Question

How many moles of oxygen are in 2.71×10 molecules of co2

Answer 1

First calculate the mole of CO2

2.71×10 molecules of co2 * 1 Mole CO2 /6.022 *10^23 molecules of CO2

= 4.5*10^-14 Mole  CO2

1 mole of CO2 has 2 mole oxygen  

 

4.5*10^-14 Mole  CO2 *2/1

= 9.0*10^-14 Mole oxygen  

Answer 2

There are $0.90\times 10^{-22}$ moles of oxygen atoms

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given molecules}}{\text {Avogadros number}}=\frac{2.71\times 10}{6.023\times 10^{23}}=0.45\times 10^{-22}mol$

1 mole of $CO_2$ contains = 2 mole of oxygen atoms

Thus $0.45\times 10^{-22}$ mole of $CO_2$ contains =$\frac{2}{1}\times 0.45\times 10^{-22}=0.90\times 10^{-22}mole$ of oxygen atoms

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