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Chemistry
University
Assignment 1.1: Definition of Chemistry and Matter
22 questions
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- 1. Multiple ChoiceWhich of these is NOT made up of two or more substances that are combined physically?homogeneous mixturecompoundheterogeneous mixturesolution
- 2. Multiple ChoiceWhat happens during a physical change?new substances formthe identity of a substance is changedA chemical reaction occursa property of the substance changes but its identity stays the same
- 3. Multiple Choicewhich of the following is a chemical change?water boilingpaper being cutice meltingiron rusting
- 4. Multiple ChoiceFizzing, color change, or gas generation are signs of what?physical changechemical change
- 5. Multiple ChoiceWhich is example of a chemical and physical change?Tearing paper and breaking an eggTearing paper and burning itiron rusting and cooking an eggboiling water and breaking an egg
- 6. Multiple ChoiceWhen ice melts it is an example ofnuclear changechemical changephysical changeatmospheric change
- 7. Multiple ChoiceThe law of conservation of mass states what?Matter is neither destroyed nor changedMatter is neither destroyed or createdMatter is neither created nor changedElements are the smallest unit of matter
- 8. Multiple ChoiceWhich of the following is true according to the law of the conservation of matter?The mass of the reactants is less than the productsThe mass of the reactants equals the products minus gasThe mass of the reactants equals the mass of the products in a closed systemGases are generated during chemical reactions
- 9. Multiple ChoiceAnything that takes up space and has mass is known as _______________.MatterMoleculesCompoundsStuff
- 10. Multiple ChoiceWhat are the building blocks of MATTER?AtomsCellsProtonsNeutrons
- 11. Multiple Choice
A substance made of only one type of atom that cannot be broken down by chemical means
compound
element
electron
molecule
- 12. Multiple Choice
Substance made of atoms of different elements that are bonded together in a particular ratio
molecule
compound
charge
electron shell
- 13. Multiple ChoiceA gashas a definite shape but no definite volumehas a definite volume but no definite shapehas fast-moving particles
- 14. Multiple ChoiceWhich state of matter has tightly packed molecules?solidliquidgas
- 15. Multiple ChoiceLiquids are described as having adefinite shape and indefinite volumeindefinite shape and indefinite volumedefinite shape and definite volumeindefinite shape and definite volume
- 16. Multiple ChoiceGases are described as having adefinite shape and indefinite volumeindefinite shape and indefinite volumedefinite shape and definite volumeindefinite shape and definite volume
- 17. Multiple ChoiceWhat is a heterogeneous mixture?Any type of mixture.A mixture where the substances cannot be separated.A chemical reaction.A mixture where the substances can be separated.
- 18. Multiple ChoiceThe amount of matter that an object has is its . . . . .densitymassvolumeelement
- 19. Multiple Choice________ are composed of two or more different substances that are combined physicallyCompoundsElementsMixturesMass
- 20. Multiple ChoiceWhen sugar dissolves in tea, the result is a _______________.
concentratesolventsolutionsolute - 21. Multiple ChoiceA reaction accompanied by the release of heat.endothermicexothermiccatalystactivation energy
- 22. Multiple ChoiceA reaction accompanied by or requiring the absorption of heat.endothermicexothermiccatalystactivation energy
- Answer choicesTagsAnswer choicesTags