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When pure carbon is burnt in air oxidized to CO and CO2.if the molar ratio of CO to CO2 is 2 and the molar ratio of N2 to O2 is 7.18 then what is the percentage excess air used?

Using a sample of 30.0 mL of Kr(g), is at 25°C and 756 mmHg. Calculate the new volume if the temperature is decreased to -125°C and pressure is decreased to 325 mmHg .

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