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Reika [66]
3 years ago
5

If a substance cannot be separated physically it is?

Chemistry
2 answers:
MArishka [77]3 years ago
3 0
Its an element Im pretty sure 
bezimeni [28]3 years ago
3 0
A substance you cant physically change is copper grains, and iron fillings
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Answer:

B.) Oxygen is usually -2

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Hydrogen is usually +1.

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Draw a lewis structure for ketene, c2h2o, which has a carbon–carbon double bond
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Visual representation of covalent bonding indicating the valence shell electrons in the molecule, lines represents the shared pair of electron and pair of electrons that are not involved in bonding are represented as dots(lone pairs) are known as Lewis structures.

Compound formation takes place in order to complete the octet of each element that is according to octet rule, each atom forms bond with other atom in order to complete their octet that is to get eight electrons in its valence shell and attain stability.

An organic compound of the form R^{'}R^{''}C=C=O is known as ketene.

The given ketene is C_2H_2O.

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C = 4

H = 1

O = 6

The number of valence electrons in C_2H_2O = 2\times 4+2\times 1+1\times 6 =16

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Therefore, the attached image is the Lewis structure of C_2H_2O .

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