Question

In one mole of glucose, how many oxygen atoms are present?

Answer 1

In glucose, `C_6H_12O_6`.....I gets `180.16*g` of glucose.

Explanation:

`"Moles of oxygen atoms"` `=` `6xx"moles of glucose"`. Why? Because CLEARLY, each mole of glucose, `C_6H_12O_6` contains `6*mol` oxygen atoms.

Note that I am labouring the point that we deal with OXYGEN ATOMS , NOT OXYGEN MOLECULES.

`96*g` oxygen is a molar quantity of `(96*g)/(16*g*mol^-1)=6*mol` with respect to oxygen atoms.

And of course if there are `6*mol` oxygen atoms, there must be `1*mol` glucose. Agreed?

We are not quite finished because we were asked for the mass, and so we multiply the molar quantity by the molar mass of glucose.....

`1*molxx180.16*g*mol^-1=180.16*g`.

Capisce?