When most metallic elements are heated in the presence of oxygen, they undergo a combustion reaction producing a metal oxide as the product. In an experiment of this type, a pure metal was heated in air then cooled and weighed. This process was repeated until the mass of the product was no longer changing. The data recorded in the notebook are shown below. What is the percent by weight of oxygen in the oxide product that was produced? Heating a metal in air: initial mass of metal (g) = 1.62 mass after first heating (g) = 2.23 mass after second heating (g) = 2.49 mass after third heating (g) = 2.51
When most metallic elements are heated in the presence of oxygen, they undergo a combustion reaction producing a metal oxide as the product. In an experiment of this type, a pure metal was heated in air then cooled and weighed. This process was repeated until the mass of the product was no longer changing. The data recorded in the notebook are shown below. What is the percent by weight of oxygen in the oxide product that was produced?
Heating a metal in air:
initial mass of metal (g) = 1.62
mass after first heating (g) = 2.23
mass after second heating (g) = 2.49
mass after third heating (g) = 2.51
Report your answer as % w/w to the nearest 0.1%. (Canvas will automatically adjust significant figures due to a flaw. Please ignore.) Do not include the % sign in the answer box.
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