Answer:
A
Explanation:
There is a specific tool called an oil drill that drills into the ground and then a pipe sucks the oil up onto a vessle
Answer:
H2O
Explanation:
There are 2 hydrogen atoms and 1 oxygen atom
<span>Balanced half-reaction: Au</span>⁺<span>(aq) </span>→ <span> Au</span>³⁺(aq) + 2e⁻.
Oxidation reaction is increasing of oxidation number of element, because element or ion lost electrons in chemical reaction.
Gold lost two electrons and change oxidation number from +1 to +3.
Reduction is lowering oxidation number because element gain electrons.
When an object becomes warm it is an example of exothermic reaction
Warning signs that are monitored by seismologists are earthquakes activity and deformation and active tectonics. Which is tracked by seismographs, historical data can be used to identify fault zones and other likely sources of future events, and to assess earthquake hazards.