Why does the moon orbit Earth? Select all that apply.

Chemistry

2 answers:

S_A_V [24]2 years ago

7 0

Answer: d

Explanation:

Earth is larger than the moon, so Earth pulls on the moon

charle [14.2K]2 years ago

6 0

D. The gravity of Earth influences the moon and other less massive objects around it.

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What is best classified as a physical change?

andrew-mc [135]

A physical change is a change to a sample of matter in which some properties of the material change, but the identity of the matter does not. Physical changes can further be classified as reversible or irreversible. The melted ice cube may be refrozen, so melting is a reversible physical change.

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3 years ago

Ch3cooh (acetic acid) can form hydrogen bonds between its molecules. based on the lewis structure shown below, how many hydrogen

never [62]

Answer:
Number of Hydrogen Bond Acceptor atoms = 2

Number of Hydrogen Bond Donor atoms = 1

Explanation:
Hydrogen bond interactions are formed between those molecules which contains partial positive hydrogen atoms bonded covalently to most electronegative atoms like Oxygen, Nitrogen and Fluorine.
When hydrogen is attached to Oxygen, Nitrogen or Fluorine its electron density decreases and gets partial positive charge, this partial positive charged hydrogen atom then makes hydrogen bonding with the most electronegative element (partial negative) of neighbor molecule.
In Acetic acid there are two oxygen atoms hence there are two most electronegative elements therefore, two Hydrogen Bond Acceptor atom and each oxygen atom can accept two hydrogen bonds.
Also, it contains only one Hydrogen atom attached to oxygen atom so it has one Hydrogen Bond Donor atom.