Chemical Reactions 8.P.1.4: Question Preview (ID: 21693)


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You burn a candle wick to create CO2 and ash. What are the PRODUCTS of this reaction?
a) Candle wick b) Candle wick and oxygen c) CO2 and the candle wick d) CO2 and ash
You burn a candle wick to create CO2 and ash. What are the REACTANTS in this reaction?
a) Candle wick b) candle wick and oxygen c) CO2 and the candle wick d) CO2 and ash
You burn a candle wick to create CO2 and ash. Which of these statements is true?
a) The mass of the wick is GREATER than the mass of the CO2 and ash combined. b) The mass of the wick and oxygen is LESS than the CO2 and ash. c) The mass of the wick and oxygen is THE SAME as the CO2 and ash. d) The mass of the wick and oxygen is GREATER than the CO2 and ash.
Doctors put a testing chemical into a sample of blood, which then turns bright green. Which statement is true?
a) You just saw a chemical reaction b) You just saw a physical change c) The chemical and the blood must have both been bases d) The chemical and the blood must have both been acids
An engineer dissolves oxygen into a new soda shes's creating. Which of these is true?
a) This would make a heterogeneous mixture b) This would make a homogeneous mixture c) This is a chemical reaction d) This is combustion
In a chemical reaction...
a) ... all compounds remain the same b) ... atoms are created and destroyed c) ... atoms are rearranged but not created or destroyed d) ... there is always fire
A pharmacist accidentally mixes two liquid medicines together. The beaker they were in grows very hot. This must be...
a) A chemical reaction b) A physical reaction c) Combustion d) It's impossible to make this happen!
A chef heats up a soup until it begins to bubble. This is...
a) A chemical change b) A physical change c) Proof that aliens exist d) Why we can't have nice things
Iron heats up faster than plastic.
a) Iron must have a lower boiling point than plastic b) Iron must have a higher boiling point than plastic c) Iron must have a lower specific heat than plastic d) Iron must have a higher specific heat than plastic
Chemical properties...
a) Can only be seen in chemical reactions b) Change over time c) Can not be observed d) Include specific heat, density, and pH
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