DescriptionCombustion reaction of methane.jpg English: Visual of how the law of conservation of mass means that there must be same number of atoms of each element...
https://www.flickr.com/photos/internetarchivebookimages/14582708249/ operator: Flickr URL: https://live.staticflickr.com/5574/14582708249_38ac0b0f10_o.jpg...
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