What mass of oxygen gas would be consumed by the complete combustion of 7.5 g of a mixture of propane (C3H8) and butane (C4H10) in the mole ratio of 
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Standardization
The process of implementing and developing technical standards to ensure that certain processes, materials, and products are fit for their purpose and can be reliably produced and used by multiple parties.
Intelligence Score
A measure that reflects a person's cognitive abilities and potential, often derived from standardized tests.
Stranger
A person whom one does not know or with whom one is not familiar, often invoking a sense of unfamiliarity or caution.
Vary
To exhibit differences or changes in characteristics, amount, or other measurable attributes under different conditions or over time.
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