Chemical Reactions

What is the coefficient of P2O5 when the following equation is balanced with small, whole-number coefficients? ____ P2O5 + ____ H2O → ____ H3PO4

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What is the coefficient of P2O5 when the following equation is balanced with small, whole-number coefficients? ____ P2O5 + ____ H2O → ____ H3PO4 ANSWER

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What is the missing equation coefficient that belongs in front of water (H2O) in the combustion reaction for lauric acid, a saturated fatty acid, C12H24O2? C12H24O2(s) + 17 O2(g) → 12 CO2(g) + ___ H2O(g)

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What is the missing equation coefficient that belongs in front of carbon dioxide (CO2) in the combustion reaction for octane, C8H18? 2 C8H18(l) + 25 O2(g) → ___ CO2(g) + 18 H2O(g)

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What is the coefficient of KCl when the following equation is balanced with small, whole-number coefficients? ____ KClO3 → ____ KCl + ____ O2

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What is the coefficient of aluminum when the following equation is balanced with small, whole-number coefficients? ____ Al + ____ HCl → ____ AlCl3 + ____ H2

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What is the coefficient of boron when the following equation is balanced with small, whole-number coefficients? ____ K + ____ B2O3 → ____ K2O + ____ B

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What is the missing equation coefficient that belongs in front of aluminum (Al) in the reaction shown below? ___ Al(s) + 3 Br2(g) → 2 AlBr3(s)

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What is the missing equation coefficient that belongs in front of iron (Fe) in the reaction shown below? Fe2S3(l) → ___ Fe(s) + 3 S(s)

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What is the missing equation coefficient that belongs in front of oxygen (O2) in the combustion reaction for methane, CH4? CH4(g) + ___ O2(g) → CO2(g) + 2 H2O(g)

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What is the missing equation coefficient that belongs in front of oxygen (O2) in the combustion reaction for methane, CH4? CH4(g) + ___ O2(g) → CO2(g) + 2 H2O(g))

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What is the coefficient of iron when the following equation is balanced with small, whole-number coefficients? ____ Fe + ____ O2 → ____ Fe2O3

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What is the missing equation coefficient that belongs in front of carbon dioxide (CO2) in the combustion reaction for hexane, C6H12? C6H12(l) + 9 O2(g) → ___ CO2(g) + 6 H2O(g)

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What is the missing equation coefficient that belongs in front of oxygen (O2) in the combustion reaction for glucose, C6H12O6? C6H12O6(s) + ___ O2(g) → 6 CO2(g) + 6 H2O(g)

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What is the missing equation coefficient that belongs in front of potassium hydroxide (KOH) in the reaction shown below? Al2(SO4)3(aq) + ___ KOH(aq) → 2 Al(OH)3(s) + 3 K2SO4(aq)

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Which reaction represents a combination reaction?

A + B → AB

Which reaction represents a single displacement reaction?

A + BC → B + AC

Which reaction represents a double displacement reaction?

AB + CD → AD + CB

Which reaction represents a decomposition reaction?

AB → A + B

2 CaO(s) + 2 H2O(l) → 2 Ca(OH)2(s)

Combination/synthesis reaction

C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g)

Combustion reaction

2 H2O2(l) → O2(g) + 2 H2O(l)

Decomposition reaction

2 NaOH(aq) + CuSO4(aq) → Na2SO4(aq) + Cu(OH)2(s)

Double displacement/double exchange reaction

The following boxes contain fluorine atoms (the smaller white circles) as well as nitrogen atoms (the larger blue circles). The initial box contains F2(g) and N2(g), while the final box contains NF3(g). Select the balanced equation that corresponds to the drawings.

N2(g) + 3 F2(g) → 2 NF3(g)

Identify the reaction type in the example of cooking pasta in boiling water.

Nonspontaneous reaction

Identify the reaction type in the example shown here: 2 H2O(g) → O2(g) + 2 H2(g)

Nonspontaneous reaction

The following boxes contain oxygen atoms (the smaller white circles) as well as nitrogen atoms (the larger red circles). The initial box contains O2(g) and N2(g), while the final box contains NO(g). Select the balanced equation that corresponds to the drawings.

O2(g) + N2(g) → 2 NO(g)

Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g)

Single displacement/single exchange reaction

Identify the reaction type in the example of iron nails rusting.

Spontaneous reaction

Identify the reaction type in the example of logs burning in a campfire.

Spontaneous reaction

Identify the reaction type in the example of salt dissolving in water.

Spontaneous reaction