In the reaction C + 02 - CO2, 18 g of carbon react with oxygen to produce 72 g of carbon dioxide. What mass of oxygen would be needed in the reaction? O 18 g O 54 g O 72 g 0 90 g

Mass of oxygen : 54 g

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

Reaction

mass before reaction = mass after reaction

mass C + mass O₂= mass CO₂

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

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the correct answer to this question is 2