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Balancing Chemical Equations Phet Key

This worksheet guides students through a chemistry simulation on balancing chemical equations. It includes questions on molecule and atom counts, reaction types, and helps develop understanding of conservation of mass through interactive exploration.

Daniel Miller
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5 months ago
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Name:Hr:BALANCING CHEMICAL EQUATIONSLoad the simulation Balancing Chemical Equationshttp://phet.colorado.ed u/en/sim ulation/balancing-chemical-equations1.Explore theBalancing Chemical Equationssimulation.a)What are rhe different ways that the simulation indicates when an equation is balanced?The arrows turn yellow and a yellow smiley face pops out of nowhereYou can also choose a balance and it shows how its balancedThere is also a graph where you can see itFor each balanced reaction, indicate the total number of molecules in tire table below, it shows abalance above for each element as well as a bar graphReactionTotal Number of MoleculesReactant Side(Left)Product Side(Right)Make Ammonia42Separate Water23Combust Methane333. Is the number of total molecules on the left side of a balanced equation always equal to thenumber of total molecules on the right side of the equation? Explain your answer.No, the molecules don't always equal since the atoms combine in different ways to make themolecules.4. For each balanced reaction, indicate the total number of atoms in the table below.ReactionTotal Number of Atoms

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■Reactant' 1Product Side(Right)(Left)Make Ammonia88Separate Water66Combust Methane995. Is the number of total atoms on the left side of a balanced equation always equal to die number oftotal atoms on the right side of the equation?Yes6. What is the same on the left and right side of a balanced equation? Explain your answer.The number of atoms of each element. To show that we did not create or destroy any atoms we mustalways have the same number of atoms of each element on both sides.7. Play level 1 of the balancing equation game.8. Start level 2 of the balancing equation game.9. in the simulation, were you able to use non-integer num bers (like Vzo r 0.43) for the coefficients ina balanced equation? Why do you think tills is?No, you can't change have a part of a molecule, you can only have whole molecules.a)Which of the following are coefficients you could use in a balanced equation?WV*X IX 2X 6X9b) If you were balancing an equation containing the Ch molecule, which of the following would becorrect representations of Ch and its coefficient?]/z(JL XCh X 30,X 6 0 ,3 050.10.What do you have to do to the coefficients of equation I below to get to equation II?You divide them by 22 SnOa + 4 IL -2 Sn + 4LL0i.
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Chemistry

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