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Oxygen Consumption Proportion to Natural Gas Burned

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nt of natural gas burned is proportional to the amount of oxygen consumed. if 24.0 kg of oxygen is consumed in burning 15.0 kg of natural gas, how much air, which is 23.2% oxygen by weight, is consumed to burn 50.0 kg of natural gas?
a. 80.0 kg b. 345 kg c. 31.3 kg d. 135 kg

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Suppose y is the amount of gas and x is the amount of oxygen. ...

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The amount of natural gas burned is proportional to the amount of oxygen consumed. How much air is consumed to burn 50 kg of natural gas?

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Guidance to Questions on Alternatives to Petrol Fuels

Need to write a critical review about the attached published article, with respect to the prospects for renewable energy in the transportation sector, can you please help and make it simple as I have read the article over and over again, hopefully about 400 words in total should be enough to answer each point below thanks.

Apologies but this is all I can offer for total credits, unfortunately I have just a part time job and brainmass gives me that opportunity to have things explained a lot more clearer for me to understand, I wish I can offer more but I can't sadly, I ask for 400 words no more, thanks for your support.

Please can you base your review on the following guideline questions:

How have the authors formulated the problem/issue?
Do the authors refer to the work of others that they do not agree with?
What are the key concepts or the main factors or variables discussed?
What are the relationships between these key concepts, factors or variables?
What evidence is lacking, inconclusive, contradictory or too limited?
What, if any, evidence might seem unsatisfactory and why?
In what ways does this article contribute to your understanding of the role of renewables in a sustainable energy system?

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