Sapling Wk8 Q. 18, Determining Molecular Shape

(Polar molecules, Non-polar molecules, etc.)

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Angel Gutierrez 2E
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Sapling Wk8 Q. 18, Determining Molecular Shape

Postby Angel Gutierrez 2E » Sat Nov 28, 2020 11:49 am

does the order of the molecular formula affect the way you draw the structures? FOor example, in H2CCCH2, are two hydrogens supposed to be on each ends?
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IsaacLaw1E
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby IsaacLaw1E » Sat Nov 28, 2020 11:54 am

Yes it does. The molecular formula H2CCCH2 is read from left to right. So there are two hydrogens on the left bonded to a carbon, which is bonded to another carbon, which is bonded to another carbon, which is bonded to the two hydrogens on the right. And from there the double bonds for carbon are easy to place.

Katie Lam 2J
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby Katie Lam 2J » Sat Nov 28, 2020 11:56 am

Yes it does. However, in your structure for H2CCCH2, you have 3 H's on the end instead of 2. Isaac is also correct in that there should be a double bond between every C.

ALee_1J
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby ALee_1J » Sat Nov 28, 2020 1:02 pm

To add, typically hydrocarbons (molecules with only hydrogens and carbons) are linear/chains. So all you really need to do is draw the carbons, put in the hydrogens, and then fill in the double bonds of the carbons where necessary.

Kayla Booker 1F
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby Kayla Booker 1F » Sat Nov 28, 2020 1:50 pm

Yes, I believe that you read molecules from left to right

Sandy Lin 1L
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby Sandy Lin 1L » Sat Nov 28, 2020 1:56 pm

Yes, most of the time, the way the molecular formula is written indicates which atoms are bonded together. Especially when the same atoms are written out instead of just using a subscript to show how many of the atom there are.

Shivani Kapur 2J
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby Shivani Kapur 2J » Sat Nov 28, 2020 1:59 pm

Yes, molecules are read from left to right.

VincentLe_3A
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby VincentLe_3A » Sat Nov 28, 2020 2:02 pm

The molecular formula suggests the bonding structure between the atoms within the molecule. Especially in molecules with carbon and hydrogen, carbon is the backbone of the molecule, so make the bonds between carbons, add in the hydrogens, and finally place double bonds where needed to fulfill octet rule.

Madison Muggeo 3H
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby Madison Muggeo 3H » Sat Nov 28, 2020 2:55 pm

Hi! You would read the molecule from left to right, and it will give you the order. Hope this helps!

Annette Fishman
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby Annette Fishman » Sat Nov 28, 2020 2:59 pm

Molecules are read left to right to be given the order!

Annette Fishman
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Re: Sapling Wk8 Q. 18, Determining Molecular Shape

Postby Annette Fishman » Sat Nov 28, 2020 2:59 pm

Molecules are read left to right to be given the order!


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