When evacuated or empty, a gas density bulb weighs 29.3215 g. First, CO2 gas was used to fill the bulb at 40°C and 1 atm and it weighed 30.0079 g. The bulb was then evacuated and filled with a mixture of CO and CO2 under the same temperature and pressure. With this mixture, the bulb weighed 29.9332 g. Find the % of CO in the mixture.

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