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- 1. Multiple ChoiceAn example of a chemical property is reactivity. This isa measure of how easily a substance combines with other substances to produce a new substancethe danger to your health caused when a poisonous substance combines with chemicals in your bodyan indicator of how easily a substance catches fire. This creates a new substance
- 2. Multiple Choice
A group of atoms bonded together.A MoleculeThe CoefficientThe SubscriptAn Atom Party - 3. Multiple ChoiceHow many hydrogen atoms are in this chemical formula:4 hydrogen atoms1 hydrogen atom2 hydrogen atoms3 hydrogen atoms
- 4. Multiple ChoiceHow many molecules are in this chemical formula?4 Molecules6 Molecules2 Molecules5 Molecules
- 5. Multiple ChoiceHow many oxygen atoms are in this chemical formula?6 oxygen atoms2 oxygen atoms3 oxygen atoms4 oxygen atoms
- 6. Multiple ChoiceThe one or two letters used to represent elementsYield signCoefficientSymbolSubscript
- 7. Multiple ChoiceElement or compound?
H2Oelementcompound - 8. Multiple ChoiceElement or compound?
O2ElementCompound - 9. Multiple ChoiceHow many elements are in C6H12O6?1234
- 10. Multiple ChoiceA physical change is?It changes the object into something differentObjects or substances undergo a change that does not change their chemical compositionit is just like a chemical reactionPaper burning
- 11. Multiple ChoiceA chemical change is?a shoe lace cut in halfdoesn't change anythingchanges the look of an objectchange that results in the formation of new chemical substances
- 12. Multiple ChoiceWhich of the following is a compound?CoO2CCO2
- 13. Multiple ChoiceHow many O's are in Al₂(SO₄)₃412724
- 14. Multiple ChoiceYou know you a chemical reaction has occurred ifthere is a precipitate.there is a color change.there is a temperature change.All of these answers are evidence.
- 15. Multiple ChoiceA compound is made up ofone or more different atoms.one or more atoms.one or more mixtures.one or more solutions.
- 16. Multiple ChoiceWhat is the left part of a chemical equation called?
H2 + O → H2OReactantsProductsYieldsChemical Equation - 17. Multiple ChoiceWhat is the right part of a chemical equation called?
H2 + O → H2OReactantsProductsYieldsChemical Equation - 18. Multiple ChoiceIs this balanced?
2HgO → 2Hg + O2YesNo - 19. Multiple ChoiceWhen materials combine to form new compounds it is a chemical change. Which example is a chemical change?baking powder fizzingwater boilingice meltingsugar cube dissolving
- 20. Multiple ChoiceWhich is an example of a chemical reaction?paper cut into small pieceschocolate melting in a panflour and sugar mixed in a bowlcookies baking in an oven
- 21. Multiple ChoiceWhich of the following IS a physical change?Getting a haircutRusty metalsour milkA compound
- 22. Multiple ChoiceIn a ___________change, a substance changes into a different substance.PhysicalChemical
- 23. Multiple ChoiceA candle is lite and placed placed under a jar. The candle willstay alight as is uses up the carbon dioxide and makes oxygengoes out as it uses up the oxygen and releases carbon dioxide.Will pop as the Hydrogen gas in the jar will burngoes out as the air in the jar is used up
- 24. Multiple ChoiceEating chocolate on a hot day can be difficult.The chocolate will evaporate and become a liquidThe hot air causes the chocolate to chemically react to form something sour.Energy is transferred from the hot air surrounding the chocalate causes it to melt.
- 25. Multiple ChoiceYou can tell a new substance is formed when all but one of the below happensan odour is detectedbubbles appearLight is emitted from a flamesolid dry ice turns to a gas
- 26. Multiple ChoiceTo produce Hydrogen you would need to have ...a metal such as zinc and a carbonate such as limetstonean acid such as hydrochloric acid plus a carbonatean metal such as magnesium plus an acid such as hydrochloric acida balloon that you light
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