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In a 4.50L sealed, evacuated flask, Robert injected 2.25g of liquid water and then heated it...

In a 4.50L sealed, evacuated flask, Robert injected 2.25g of liquid water and then heated it up to 50.0°C, while measuring the p inside. When the system stabilised, p total = 196.0mmHg. What percentage of water remains as liquid in the flask?

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