Solution Manual For Chemistry: The Molecular Nature Of Matter And Change, 7th Edition

Solution Manual For Chemistry: The Molecular Nature Of Matter And Change, 7th Edition is here to help you with textbook problems, offering clear solutions and helpful explanations.

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1-1CHAPTER 1KEYS TO THE STUDY OFCHEMISTRYFOLLOW–UP PROBLEMS1.1APlan:The real question is “Does the substance change composition or just change form?” A change incomposition is a chemical change while a change in form is a physical change.Solution:The figure on the left shows red atoms and molecules composed of one red atom and one blue atom. The figureon the right shows a change to blue atoms and molecules containing two red atoms. The change ischemicalsincethe substances themselves have changed in composition.1.1BPlan:The real question is “Does the substance change composition or just change form?” A change incomposition is a chemical change while a change in form is a physical change.Solution:The figure on the left shows red atoms that are close together, in the solid state. The figure on the right shows redatoms that are far apart from each other, in the gaseous state. The change isphysicalsince the substancesthemselves have not changed in composition.1.2APlan:The real question is “Does the substance change composition or just change form?” A change incomposition is a chemical change while a change in form is a physical change.Solution:a) Both the solid and the vapor are iodine, so this must be aphysicalchange.b) The burning of the gasoline fumes produces energy and products that are different gases. This is achemicalchange.c) The scab forms due to achemicalchange.1.2BPlan:The real question is “Does the substance change composition or just change form?” A change incomposition is a chemical change while a change in form is a physical change.Solution:a) Clouds form when gaseous water (water vapor) changes to droplets of liquid water. This is aphysicalchange.b) When old milk sours, the compounds in milk undergo a reaction to become different compounds (as indicatedby a change in the smell, the taste, the texture, and the consistency of the milk). This is achemicalchange.c) Both the solid and the liquid are butter, so this must be aphysicalchange.1.3APlan:We need to find the amount of time it takes for the professor to walk 10,500 m. We know how many milesshe can walk in 15 min (her speed), so we can convert the distance the professor walks to miles and use her speedto calculate the amount of time it will take to walk 10,500 m.Solution:Time (min) = 10,500 m�1 km1000 m� �1 mi1.609 km� �15 min1 mi�= 97.8869 =98 minRoad map:1000 m = 1 km1.609 km = 1 miDistance (m)Distance (km)Distance (mi)

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Chemistry: The Molecular Nature Of ...

Solution Manual For Chemistry: The Molecular Nature Of Matter And Change, 7th Edition

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