Concepts of modern science - ABSTRACT - topic - Simple and complex substances, mixtures. Energy effect chemical reactions give up in 2016 in the MEI, score 5.
Content.
Introduction .............................................................................. .... 3
1. Simple and complex substances ................................................ 4
Atoms and molecules. Pure substances and mixtures thereof. Simple and complex substances ................................................................................. .4
2. Energy effect of chemical reactions ........................... ..8
Conclusion

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