Answer:
D 1 and 3 only I am not sure
Explanation:
Acetic Acid has two C atoms, four H atoms, and two O atoms, so the molecular formula is C2H4O2.
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Answer:
Explanation:
To find the mass percent composition of an element, divide the mass contribution of the element by the total molecular mass. This number must then be multiplied by 100% to be expressed as a percent.
Answer:
9/11 happened on the 11th of September