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Can someone please help me with these true or false questions?! Thank you

Can someone please help me with these true or false questions?! Thank you-example-1

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Answer:

Question 4. True - As when water is boiled the water molecules expand and this exapansion leads more amount of salt that can be dissolved in it.

Question 5. True - As solubility curves show how the solubility of a solute in a given solvent changes as the temperature changes.

Question 6. True - As the solubility of KNO3 increases more than six times between 0 and 50 degrees C.

Question 7. False - As the solubility curve indicates changes in temperature for solubility of substances.

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