Answer: Mixture
Explanation:
If there is and unstable element composition of say, pure graphite an un-pure gold then a chemical reaction will most likely be used to separate the two elements.
Answer:
C.
Event A represents volcanic eruption and Event B represents creation of mountain ranges.
Sorry if it's wrong :(
It is useful and the cylinder graduated for us
Answer:
Plants produce oxygen during photosynthesis, and they also need oxygen gas from the air for cellular respiration
Explanation: