<p>A mixture of gases contains&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mi>H</mi><mn>2</mn></msub><mo>&#160;</mo><mi>a</mi><mi>n</mi><mi>d</mi><mo>&#160;</mo><msub><mi>O</mi><mn>2</mn></msub></math>&nbsp;gases in the ratio of 1 : 4 (w/w). What is the molar ratio of the two gases in the mixture?</p>