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3 The long glass tube was set up as shown in this diffusion experiment. glass tube rubber bung cotton wool soaked in ammonia solution

3 The long glass tube was set up as shown in this diffusion experiment. glass tube rubber bung cotton wool soaked in ammonia solution X cotton wool soaked in concentrated hydrochloric acid C The substance that forms around X is evidence that gas particles are spreading in the tube. Explain why. d What causes the gas particles to spread? e What will happen if the cotton wool soaked in hydrochloric acid is replaced by cotton wool soaked in ammonia?

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