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R.Q. is (1) CO2 /O2...
 
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R.Q. is (1) CO2 /O2 (2) C/N (3) O2 /CO2 (4) N/C

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R.Q. is

(1) CO2 /O2

(2) C/N

(3) O2 /CO2

(4) N/C

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Correct answer: (1) CO2 /O2

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