Physics, 16.03.2020 19:16 msladycie8831

Which of the following are decomposition reactions?
A. 2LiOH (s) + CO² (g) --> Li²CO³ (s) + H²O (I)
B. K²CO³ (s) --> K²O (s) + CO² (g)
C. 2SO³ (g) --> 2SO² (g) + O² (g)
D. 2Na (s) + Cl² (g) --> 2NaCl (s)

Answers: 2

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Answer from: hadwell34

The 2 decomposition reactions are:

B. $K_{2}$ $CO_{3}$ (s) --> $K_{2} O$ (s) + $CO_{2}$ (g)

C. $2SO_{3}$ (g) --> $2SO_{2}$ (g) + $O_{2}$ (g)

Explanation:

Step 1:

A decomposition reaction is one in which a single compound breaks down into two or more products.

Step 2:

Let us examine each reaction if it satisfies the above rule.

A. 2 LiOH + $CO_{2}$ ---> $Li_{2} CO_{3}$ + $H_{2} O$

In this reaction we have 2 reactants giving 2 products. Hence this is not a decomposition reaction.

B. $K_{2} CO_{3}$ ---> $K_{2} O$ + $CO_{2}$

In this reaction a single reactant potassium carbonate gives rise to 2 products Potassium Oxide and carbon-di-oxide. Hence this is a decomposition reaction

C. $2SO_{3}$ ---> $2SO_{2}$ + $O_{2}$

In this reaction a single reactant sulfur tri-oxide gives rise to 2 products sulfur di-oxide and oxygen. Hence this is a decomposition reaction.

D. 2Na + $Cl_{2}$ ---> $2NaCl_{}$

In this reaction 2 reactants sodium and chlorine gives rise to a single product sodium chloride. Hence this is not a decomposition reaction.

Step 3:

The 2 decomposition reactions are:

B. $K_{2} CO_{3}$ (s) ---> $K_{2}O$ (s) + $CO_{2}$ (g)

C. $2SO_{3}$ ---> $2SO_{2}$ + $O_{2}$

Answer from: Quest

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf, ℰ, to a battery's terminal voltage, v, current, i, and internal resistance, r, is ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.

Answer from: Quest

Answerthe global climate during the paleogene departed from the hot and humid conditions of the late mesozoic era and began a cooling and drying trend which dispite having been periodically disrupted by warm periods such as the paleocene-eocene thermal maximum, persists today;

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Which of the following are decomposition reactions?
A. 2LiOH (s) + CO² (g) --> Li²CO³ (s) +...

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