Ph = A
Acid = C
Base = D
Litmus paper = B
Term = ?
B I think is right. Hope this helps!
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The balanced reaction that describes the reaction between methane and oxygen to produce water and carbon dioxide is expressed CH4 + 2 O2 = CO2 +2H2O. Hence for 2 moles of methane used, 4 moles of oxygen are needed to react completely.