What are the number of moles of CO2 which contains 16 g of oxygen?

Question

abhisar · Answer

1 mole of $\sf CO_2$ has 12 g of carbon and $2 \times 16$ g of oxygen, so how many moles of $\sf CO_2$ will have 16 g of oxygen?

photon336 · Answer

1 mole of every substance has 6.02x10^23 particles. for starters. 

$$CO2$$ has one carbon atom and two oxygen atoms 

now to figure this out we need to look at our periodic table of elements which shows us the molecular weight of each atom. 

for oxygen it's 16 amu  
for carbon it's 12 amu 

what's amu? that's our atomic mass unit, our unit for measuring how heavy our element is. we want our mass in grams because we're not dealing with just one simple atom; in-fact we're dealing with a mole, or 6.02x10^23 particles of those atoms, and when we take into account moles of substances only then our units will be in grams, that's what we want to work with.  

1 mole of oxygen atoms = 16g 
1 mole of carbon atoms = 12g 

now for our molecule we have CO2

so 1 mole of CO2 

will have 1 mol Carbon atoms 
will have 2 mol of oxygen atoms. 

I think it's clear now what to do.