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Sergeu [11.5K]
3 years ago
6

Which reaction below represents a balanced, double replacement chemical reaction? A) C2H5OH + 3O2 → 2CO2 + 3H2O B) Rb2O + Cu(C2H

3O2)2 → 2RbC2H3O2 + CuO C) 2Al + 3H2SO4 → 3H2 + Al2(SO4)3 Eliminate D) 2H2O → 2H2 + O2
Chemistry
2 answers:
guajiro [1.7K]3 years ago
8 0
Option B. <span>Rb2O + Cu(C2H3O2)2 → 2RbC2H3O2 + CuO is the correct answer. HOPE IT HELPS</span>
julia-pushkina [17]3 years ago
7 0

<u>Answer:</u> The correct answer is Option B.

<u>Explanation:</u>

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

AB+CD\rightarrow CB+AD

For the given options:

  • <u>Option A:</u>

The chemical equation follows:

C_2H_5OH+3O_2\rightarrow 2CO_2+3H_2O

This is a type of combustion reaction because an organic compound reacts with oxygen gas to produce carbon dioxide gas and water molecule

  • <u>Option B:</u>

The chemical equation follows:

Rb_2O+Cu(C_2H_3O_2)_2\rightarrow 2RbC_2H_3O_2+CuO

This is a type of double displacement reaction.

  • <u>Option C:</u>

The chemical equation follows:

2Al+3H_2SO_4\rightarrow 3H_2+Al_2(SO_4)_3

This is a type of single displacement reaction because a more reactive metal (aluminium) is replacing a less reactive metal (hydrogen).

  • <u>Option D:</u>

The chemical equation follows:

2H_2O\rightarrow 2H_2+O_2

This is a type of decomposition reaction because a single large compound is getting broken down to smaller substances.

Hence, the correct answer is Option B.

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The molecular formula of compound is Al(C_{2}H_{3}O_{2})_{3}.

Since, in 1 mole of  Al(C_{2}H_{3}O_{2})_{3} there are 6.023\times 10^{23} atoms of  Al(C_{2}H_{3}O_{2})_{3}.

Thus, according to molecular formula, in 1 mole of  Al(C_{2}H_{3}O_{2})_{3} there are 6\times 6.023\times 10^{23}=3.61\times 10^{24} atoms of oxygen atoms.

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2.63\times 10^{24} atoms of oxygen \rightarrow \frac{2.63\times 10^{23}}{3.61\times 10^{24}}= 0.7285 moles of Al(C_{2}H_{3}O_{2})_{3}.

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