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The laboratory needs 22.4L oxygen, which is prepared with potassium permanganate and hydrogen peroxide respectively. What is the quality of potassium permanganate and hydrogen peroxide? Answer at 10:30. Raise the bounty.
22.4 L of O2 is 1 mol of O2.
If KMnO4 is used, the reaction formula:2KMnO4=K2MnO4+MnO2+O2,2mol KMnO4 is required, and 316g is calculated.
If H2O2 is used, the reaction formula:2H2O2=2H2O+O2,2mol H2O2 is required, totaling 34g.
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Melting point and freezing point of the same material (), melting point and freezing point of different species ().
Melting point and freezing point of the same substance (same), melting point and freezing point of different species (generally different).
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