What is the molality of a solution made by dissolving 2 moles of naoh in 10 kg of water

The mass has escaped into a gas which you can not see so the law stays true.

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Standing in the sunlight and feeling the heat on your face (uv radiation is entering the skin, converting to infrared radiation, and is absorbed by your tissues)orstanding near a fire and feeling the heat on your skin (infrared radiation transfer)

Answer (b) supersaturation;