A, because the shape of it forms and arc much like a H2O molecule.
Answer:
Is this the full question
Explanation:
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Answer:
The mixing of two chemicals may result in the production of a gas which is lost to the air. This will reduce the mass of the chemical mixture, because mass is being lost in a gaseous form.
No, because the appearance has nothing to do with system as well as the fact that appearance is only how it looks
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