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MatroZZZ [7]
3 years ago
15

When a current is passed through a solution of salt water, sodium chloride decomposes according to the following reaction:

Chemistry
2 answers:
murzikaleks [220]3 years ago
7 0
The answers are the following:
1.B 35.45
2.B 70.90
Westkost [7]3 years ago
3 0

<u>Answer:</u>

For NaCl: The correct answer is Option A.

For Cl_2 : The correct answer is Option B.

<u>Explanation:</u>

Molar mass is defined as the sum of the mass of all the atoms each multiplied its atomic masses that are present in the molecular formula of a compound. It is expressed in g/mol.

For the given chemical reaction:

2NaCl+2H_2O\rightarrow 2NaOH+Cl_2+H_2

The reactants are NaCl\text{ and }H_2O

The products are NaOH,Cl_2\text{ and }H_2

We know that:

Molar mass of Sodium = 22.99 g/mol

Molar mass of Chlorine = 35.45 g/mol

For starting substance NaCl:

Molar mass of NaCl = [(1\times 22.99)+(1\times 35.45)]=58.44g/mol

Hence, the correct answer is Option A.

For starting substance Cl_2 :

Molar mass of Cl_2=(2\times 35.45)=70.90g/mol

Hence, the correct answer is Option B.

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Shalnov [3]

Answer:

c = 0.528 J/g.°C

Explanation:

Given data:

Mass of titanium = 43.56 g

Heat absorbed = 0.476 KJ  = 476 j

Initial temperature = 20.5°C

Final temperature = 41.2°C

Specific heat capacity = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

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c = specific heat capacity of substance

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ΔT = 41.2°C - 20.5°C

ΔT = 20.7 °C

476 J = 43.56 g × c × 20.7 °C

476 J = 901.692 g.°C × c

c = 476 J / 901.692 g.°C

c = 0.528 J/g.°C  

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Hello!

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Answer:

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