It depends if it occurs naturally it has oxidation number of 0
but when it react with other element it has an oxidation number of -1
Answer:

Explanation:
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In this case, the undergoing chemical reaction is:

Next, we identify the limiting reactant by computing the available moles of ethane and the moles of ethane consumed by 60.0 grams of oxygen:

Thus, we notice there are less available moles, for that reason, the ethane is the limiting reactant. Finally, we can compute the produced moles of water by:

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An SI base unit for measuring length would be meters.
Answer:
If those values are in terms of mass, weight or velocity
Kinetic energy will be in the order 180 » 120 » 105