Answer:
the sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects. There's the definition
Step-by-step explanation:
The answer to your question is:
1.-
1 CH₄ + 2 O₂ ⇒ 1 CO₂ + 2 H₂O
1 C 1
4 H 4
4 O 4
2.- 1 MgF₂ + 1 Li₂CO₃ ⇒ 1 MgCO₃ + 2 LiF
1 Mg 1
2 F 2
2 Li 2
3 O 3
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