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- 1. Multiple ChoiceHow many elements are in C6H12O6?1234
- 2. Multiple ChoiceElement or compound?
O2ElementCompound - 3. Multiple ChoiceWhich of the following is a compound?CoO2CCO2
- 4. Multiple ChoiceWhich is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)H3SO4HSO4H4S3OH2O - 5. Multiple ChoiceHow many atoms are there TOTAL in:
H2SO46573 - 6. Multiple Choice
The red numbers in the image below represent ________subscriptscoefficientsI don't know, and don't want to tryNone of the answers are correct - 7. Multiple ChoiceThe blue numbers in the image below represent ________I don't know, and don't want to trycoefficientssubscriptsnone of the answers are correct
- 8. Multiple ChoiceWhat is the balanced equation when aluminum reacts with copper(II) sulfate to produce aluminum sulfate and copper?Al + Cu2S →Al2S + Cu2Al + 3CuSO4 → Al2(SO4)3 + 3CuAl + CuSO4 → AlSO4 + Cu2Al + Cu2SO4 → Al2SO4 + 2Cu
- 9. Multiple ChoiceThe substances at the beginning of a chemical equation are called the ____productyieldchemical symbolreactants
- 10. Multiple ChoiceIn the equation, 2Mg + O2 ---> 2MgO, which are the reactants?Mg and OMgOMg and MgOO and MgO
- 11. Multiple ChoiceHow many Valence Electrons does Argon have?23818
- 12. Multiple ChoiceHow many valence electrons does Barium (Ba) have?1256
- 13. Multiple ChoiceWhich of the following is an unbalanced equation?CaCO3 --> CaO + CO2PbO2 + 2H2-->2Pb + H2O2Na+ 2H2O-->2NaOH + H2CS2 + 2O2 --> CO2 + 2SO2
- 14. Multiple ChoiceWhat is a chemical equation?A short way to show a chemical reaction using symbolsA way to explain a chemical reaction using words
- 15. Multiple ChoiceWhat is a valence electron?An electron in the outer most occupied energy level of an atomAn electron that has properties similar to a transition metalElectrons with high reactivityNoble gases
- 16. Multiple Choice5CO2
How many molecules are there? How many elements?5 molecules, 2 elements2 elements, 5 molecules10 atoms, 5 elements15 elements, 2 molecules - 17. Multiple ChoiceName ALL the evidences that show a chemical reaction has occurred.color, gas, lightlight, precipitate, odor,color, gas, light, temperature, precipitatetemperature, smell, light, conductivity, taste
- 18. Multiple ChoiceWhich equation obeys the law of conservation of mass?H2 + O2 ------> H20C + 2H2 ----> CH42Fe2O3 ------> 2O2 + 4Fe
- 19. Multiple ChoiceBlack = Carbon (C)
White = Hydrogen (H)
What would be the formula for ethane?CH4CH6C2H2C2H6 - 20. Multiple ChoiceIn a chemical reaction, everything to the rightof the arrow is called ______________.ProductsYieldsMoleculesReactants
- Answer choicesTagsAnswer choicesTags