Sapling Wk8 Q. 18, Determining Molecular Shape

[Angel Gutierrez 2E]

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?

[IsaacLaw1E]

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]

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]

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]

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

[Sandy Lin 1L]

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]

Yes, molecules are read from left to right.

[VincentLe_3A]

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]

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

[Annette Fishman]

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

[Annette Fishman]

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