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by BlastRoom
Interpret the numbers, symbols, states, and direction in chemical equations.
#chemistry
20 questions
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In 2H2 + O2 → 2H2O, what does the coefficient 2 before H2 show?
In Al2O3, what does the subscript 3 after O show?
In C3H8 + 5O2 → 3CO2 + 4H2O, no number is written before C3H8. How many C3H8 molecules does that show?
In 2H2O, how many hydrogen atoms and oxygen atoms are represented?
What does the subscript 2 outside the parentheses mean in Ca(OH)2?
In the term 3O2, how many oxygen atoms are represented?
In NaCl(aq) → Na+(aq) + Cl-(aq), what does (aq) show?
For AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq), what does (s) after AgCl show?
The equation CaCO3(s) → CaO(s) + CO2(g) uses (g) after CO2. What does that tag mean?
In 2Na + Cl2 → 2NaCl, what does the arrow mean?
In CaCO3(s) → CaO(s) + CO2(g), what does the plus sign between CaO and CO2 mean?
For Zn + 2HCl → ZnCl2 + H2, which substance is a reactant?
In CH4 + 2O2 → CO2 + 2H2O, which substance is a product?
The equation 2Na + Cl2 → 2NaCl is shown. Which set lists the reactants?
In H2SO4 + 2KOH → K2SO4 + 2H2O, which formula names a product?
The balanced equation N2 + 3H2 → 2NH3 is shown. What particle ratio does it give?
Why is 2Mg + O2 → 2MgO balanced?
What does the balanced equation 4Fe + 3O2 → 2Fe2O3 say about amounts?
In H2SO4 + 2NaOH → Na2SO4 + 2H2O, how many moles of NaOH react with 1 mole of H2SO4?
For 2KClO3 → 2KCl + 3O2, what does balance show about oxygen atoms?
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The Five Reaction Types
40 questions
