Calculating the Moles of an Element in a Compound

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Q1. Propyl acetate, C5H10O2, gives the odor and taste to pears. How many moles of C are present in 1.50 moles of propyl acetate?

Q2. How many moles of propyl acetate, C5H10O2, contain 0.480 mole of O?

Step 1 State the given and needed quantities.

Step 2 Write a plan to convert moles of compound to moles of an element.

Step 3 Write equalities and conversion factors using subscripts.

Step 4 Set up the problem to calculate the moles of an element.

[mohamedalaa]

You saved my life, I watched this the night before my exam, i was completely lost.
Today was my semester exam and I fuckin nailed it. Thanks to you
You have no idea how much you helped me

[CHO-tumz]

You showed the most obvious solution that my teacher couldn't. Can't thanks enough

[thomasbekkering]

Was supposed to learn this like 2 years ago but I could never get my head around how it works until I saw your simple explanation. TYSM

[gauravnemani]

thank you took me forever to wrap my mind around

[Bignate]

Had to watch it 3 times until it made sense, but we got it. Thanks man, massive help

[beneditofrade]

thank u so much, u literally saved my grade rn

[melissathomas]

Thank you for explaining this concept so much better than the curriculum given to me!! I appreciate your time in making this video. Please keep making may need more assistance :)

[StevesUniverse]

But why when i find the grams for each substance separately using the moles i have obtained now of that compound. It doesn't add back to the total mass of the 1 molecule of the compound.

[lanalaurenlivinglegends]

I feel so happy and levitated after watching this.... never would have geussed its this flipping easyyy like what the fudgeee was i thinking

[KnowLaz_music]

would it be done the same way if it was two different elements in the same molecule but one having moles and the other not like e.g ... how many moles of carbon if 0.480 mole of O ?

[kurtandrewtampos]

thanks bro, my gen chem task is overdue right now and i really need to pass it because my midterms is coming up

[harithakalnath]

Thank u for explaining this concept. What a help for me🥰🥰🥰🥰. Very clear explanation.

[graemecaskey]

so how do you work out say the mass fraction of carbon when the units given for a range of compounds is in % mole?

[alaivaa]

Thank you, the method I used was a lot less efficient.

[sarahiprado]

So the subscript represents the number of moles?

[acestar]

hey can you please make a video on how we got this method or how we derived it ?

[artymis]

i never knew it was so simple.. i was always confused lol

[thatonenessy]

Omg THANK YOU!!! I literally couldn't understand my textbook at all!!

[cryoatix]

if they cancel out then why are they dividing each other?

[karnmattu]

Could you do one where you find the number of atoms, while given the number of moles. Also of an element in a compund