Butane fuel is rarely pure butane but a mixture of butane and either propane, C3H8, or pentane, C5H12. According to the molecular formula you calculated in question #Q5, is your sample almost pure butane, a mixture of butane and propane, a mixture of butane and pentane, or some other mixture? Explain your rationale.

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year