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4vir4ik [10]
3 years ago
9

Please help as fast as u can

Chemistry
2 answers:
pav-90 [236]3 years ago
6 0

Answer:D

D

DDD

DDDDDDDDDD

Explanation:

sveticcg [70]3 years ago
6 0

Answer:

C. 1 and 3 only

Explanation:

In this element representation';

The superscript (23) s the mass number. Mass Number = Protons + Neutrons

-The subscript (11) is the atomic number.

Atomic Number = Protons

This means;

Number of Protons = 11

Number of Neutrons = 23 - 11 = 12

Number of electrons = 11 (Since it is a neutral atom)

Also sodium belongs to group 1 hence number of outer electrons = 1

The correct option is;

C. 1 and 3 only

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The enthalpy of vaporization (ΔH°vap) of benzene is 30.7 kJ/mol at its normal boiling point of 353.3 K. What is ΔS°vap at this t
vazorg [7]

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

<u>Explanation:</u>

Vaporization is defined as the physical process in which liquid particles get converted to gaseous particles.

Liquid\rightleftharpoons Gas

The value of standard Gibbs free energy is 0 for equilibrium reactions.

To calculate \Delta S^o_{vap} for the reaction, we use the equation:

\Delta S^o_{vap}=\frac{\Delta H^o_{vap}}{T}

where,

\Delta S^o_{vap} = standard entropy change of vaporization

\Delta H^o_{vap} = standard enthalpy change of vaporization = 30.7 kJ/mol = 30700 J/mol    (Conversion factor: 1 kJ = 1000 J)

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Putting values in above equation, we get:

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