How many total H atoms are present in the structure shown below? 
Definitions:
Extraction Costs
The expenses associated with the removal of natural resources from the earth, such as mining for minerals or drilling for oil.
Nonrenewable Resource
A natural resource that cannot be replaced once it has been used or is not replenished in a short period of time, such as fossil fuels and minerals.
Removal
The process of moving or eliminating something from a certain place or context.
User Cost
The cost of using a good or service, considering both the expense of use and the opportunity cost of not using an alternative.
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