Determining atoms

[Roxan Sheikh 3L]

If you eat a 1.34 gram gummy bear that is 24.0% Glucose (C6H12O6) by mass, how many atoms of Oxygen did you consume?
How would you answer this question?

[Ayaan_Ekram_2J]

Hello!

You would first multiply the percentage of glucose by the total mass to find the mass of glucose eaten. Then, you would use the molar mass of glucose to convert grams of glucose to moles of glucose. Now that you have moles of glucose, you can convert to moles of oxygen as you know for every 1 mole of C6H12O6 we have 6 moles of oxygen. Finally, we would divide by Avogadro’s number as we know there are about 6.022x10^23 oxygen atoms per 1 mole of oxygen. Then, you will have the number of oxygen atoms eaten. I hope this helps!

[carterwink2K]

The dimensional analysis would go similar to this:

find the mass of glucose by multiplying by the percent, convert to the mass of oxygen by multiplying by the mass of oxygen in glucose over the total mass, then convert to moles of oxygen using the molar mass, then convert to atoms using Avogadro's number.