CBSE > Class 12 > Chemistry | CBSE Board | Homework Help

Mass of solution = Mass of benzene (C₆H₆) + Mass of CCl₄
= 22 g + 122 g = 144 g
Mass percentage of {tex}{C_6}{H_6} = \frac{{{\text{Mass of benzene}}}}{{{\text{Mass of solution}}}} \times 100{/tex}
{tex} = \frac{{22g}}{{144g}} \times 100{/tex} = 15.28%
Mass percentage of {tex}CC{l_4} = \frac{{122g}}{{144g}} \times 100{/tex} = 84.72% or 100-15.28 = 84.72%

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What is molarity.

Posted by Hemant Saini 12 hours ago

CBSE > Class 12 > Chemistry

6 answers

Ayush Rajpoot 5 hours ago

Molarity is defined as the no. Of moles of solute dissolved in one litre of solution

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Sourav Kr Singh Parmar 7 hours ago

Number of moles per unit volume

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Hritik Kumar 8 hours ago

No of moles of the solute to the volume in litre

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Deepak Jindal 11 hours ago

😎😎😎

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Deepak Jindal 11 hours ago

It is defined as the no. of moles of solute to the volume of solution in 1 litre✌✌🤔🤔

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Sia 🤖 12 hours ago

Molarity describes the number of moles of the substance per liter of liquid. In chemistry, a mole is a unit of measurement for a chemical substance. The scientific noun molarity describes the concentration of a substance as measured by the number of moles divided by the volume of the solution it's in.

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How to make a model based on electrolysis

Posted by Lipi Dey 16 hours ago

CBSE > Class 12 > Chemistry

1 answers

Sia 🤖 16 hours ago

https://www.education.com/science-fair/article/water-electrolysis/

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Write short notes on alltrophes of phosphorus

Posted by Gentle Farzan 16 hours ago

CBSE > Class 12 > Chemistry

2 answers

Yogita Ingle 14 hours ago

The main allotropes of phosphorus include the white phosphorus, red phosphorus and black phosphorus. In addition to these, there also exists a violet phosphorus. However, that is not a significant allotrope.

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Sia 🤖 16 hours ago

Elemental phosphorus can exist in several allotropes, the most common of which are white and red solids. Solid violet and black allotropes are also known. Gaseous phosphorus exists as diphosphorus and atomic phosphorus.

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What should be the conclusion for rate of fermentation of different fruit juices experiment?

Posted by Ayushi Dave 18 hours ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why cu2+ is more stable in aqueous solution

Posted by Deepika Baralu 1 day, 5 hours ago

CBSE > Class 12 > Chemistry

1 answers

Sia 🤖 16 hours ago

It is because hydration energy of Cu²⁺ ion is high compared to Cu⁺ ion. The high hydration energy of Cu²⁺ can overcome second ionization energy of Cu²⁺ .That is why Cu²⁺ is more stable than Cu⁺ ion in aqueous solution.

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Why mercury cell gives constant potential throughout its life?

Posted by Prashant Tomar 1 day, 7 hours ago

CBSE > Class 12 > Chemistry

1 answers

Deepika Baralu 1 day, 5 hours ago

If you came to know plzz tell me

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All bonds in SF4 are not equivalent . Comment

Posted by Prachi Malik 1 day, 7 hours ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Calculate Molality of 2.5 g of ethanoic acid (CH3COOH) in 75 g of benzene .

Posted by Ankit Raj 1 day, 9 hours ago

CBSE > Class 12 > Chemistry

2 answers

Sourav Kr Singh Parmar 7 hours ago

Molality of ethanoic acid =2.5/60*1000/75=0.5556

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Praveen Singh 1 day, 8 hours ago

Mass of solute=2.5g Mass of solvent=75g Molar mass of solute=2C+4H+2O =12*2+4*1+2*16 =24+4+32 =60g Moles of solute=2.5/60 =0.042mol Molality=number of moles of solute/mass of solvent in kg m=0.042*1000/75 =0.56mol/Kg

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Carbon tetrachloride and water are immiscible while Ethyl alcohol and water are miscible in all properties. Correlate the above behavior with structural nature of molecules of these compounds

Posted by Rajveer Kaur 1 day, 9 hours ago

CBSE > Class 12 > Chemistry

2 answers

Rajveer Kaur 8 hours ago

Thank you

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Prashant Tomar 1 day, 7 hours ago

CCl4 is non polar while H2O is polar.polar solvent dissolves polar solute so CCl4 is immiscble in H2O .While C2H5OH is miscible in H2O due to presence of hydrogen bonds between C2H5OH and H2O.

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If a chemical reaction 15 percent completeion in 20 min how will 60 percent completion in which time

Posted by Devansh Kamra 1 day, 11 hours ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is lampblack?

Posted by Himanshu Tiwary 1 day, 14 hours ago

CBSE > Class 12 > Chemistry

3 answers

Deepak Jindal 1 day, 8 hours ago

Black pigment made from the soot

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Yogita Ingle 1 day, 13 hours ago

Lamp Black is fabricated when tar and vegetable oils (rich in carbon) are singed in a deficient supply of air and the subsequent residue is deposited on wet blankets in a room.
Lamp Black is a velvety black powder. It is utilized as a part of the preparation of Indian ink, carbon papers, printer's ink, varnishes, and black paint.

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Sia 🤖 1 day, 13 hours ago

a black pigment made from soot

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Investigatory project topics class 12

Posted by Nitesh Kumar 1 day, 21 hours ago

CBSE > Class 12 > Chemistry

1 answers

Sia 🤖 1 day, 16 hours ago

Invisible Ink : Modeling A Molecular Switch
Absorbing Ammonia
Effect of Acid Rain on Limestone Rock
Amount of Casein in Milk
Finding EMF of Electrochemical Cell
That’s Some Smart Metal

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what type of azeotropic mixture will be formed by a solution of acetone and chloroform justify on the basis of strength of intermolecular interaction that develop in the solution

Posted by Tâñmaÿ Sanwal 2 days, 2 hours ago

CBSE > Class 12 > Chemistry

2 answers

Deepak Jindal 1 day, 20 hours ago

Maximum azeotropic mixture

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Snigdha Yadav 1 day, 21 hours ago

Maximum azeotropic mixture

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Silver is uniformly electroposited on a metallic vessel of surface area of 900 cm² by passing a current of 0.5A for 2 hours. What is the thickness of silver deposited if density of silver 10.5 g/cm³

Posted by Priya Dhawan 2 days, 3 hours ago

CBSE > Class 12 > Chemistry

1 answers

Sia 🤖 1 day, 14 hours ago

We have, mass(m) deposited is
{tex}m = Z \times I \times t{/tex}
{tex}m = \frac{{108}}{{96500}} \times 0.5 \times 2 \times 60 \times 60{/tex}
{tex} = \frac{{108 \times 5}}{{965 \times 10}} \times 2 \times 6 \times 6{/tex}= 4.03 g
{tex}4.03g = V \times d{/tex}
{tex}4.03g = V \times 10.5gc{m^{ - 3}}{/tex}
V = Area {tex} \times {/tex} Thickness
{tex}V = \frac{{4.03}}{{10.5}}{/tex}
{tex}\frac{{4.03}}{{10.5}} = 900c{m^2} \times {/tex} thickness
Thickness {tex} = \frac{{0.338c{m^3}}}{{900c{m^2}}}{/tex}
{tex} = 4.26 \times {10^{ - 4}}cm{/tex}

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What js the formula of flux

Posted by Prakshep Boby 2 days, 3 hours ago

CBSE > Class 12 > Chemistry

1 answers

Sia 🤖 1 day, 14 hours ago

{tex}\Phi _ { B } = B \cdot A{/tex}
{tex}\Phi _ { B } = B A \operatorname { Cos } \theta{/tex}
Where, B = magnetic field
A = surface area and
{tex}\theta{/tex} = angle between the normal to the surface and magnetic field.

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How to learn rxn and mechanism of rxn in organic chemistry

Posted by Mahavir Jaat 2 days, 7 hours ago

CBSE > Class 12 > Chemistry

2 answers

Deepak Jindal 1 day, 20 hours ago

From NCERT

1Thank You

Sanjay Upadhayay 2 days, 6 hours ago

Ncert

2Thank You

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What book I will refer for chemistry

Posted by Sumit Kumar 2 days, 7 hours ago

CBSE > Class 12 > Chemistry

8 answers

Deepak Jindal 1 day, 20 hours ago

NCERT

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Jyoti Saroj 2 days, 5 hours ago

morden ABC

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Prince Yadav 2 days, 5 hours ago

First finish ncert with numericals because ncert is best book

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K@Lp@N@ Singh 2 days, 6 hours ago

First you must complete NCERT and read thoroughly as many time possible. Solve NCERT questions as many times.

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Gourav Neemroat 2 days, 7 hours ago

Op tondon

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Bhavya Tiwari 2 days, 7 hours ago

Balaji publication

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Mahavir Jaat 2 days, 7 hours ago

Pradeep publications

1Thank You

Mithlesh Prajapati 2 days, 7 hours ago

Op tondon

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What will be the degree of disoociation of 0.1 M Mg(No3) 2 solution if vant hoff factor is 2.74?

Posted by Utkarsh Chauhan 2 days, 8 hours ago

CBSE > Class 12 > Chemistry

1 answers

Sia 🤖 1 day, 14 hours ago

{tex}M g \left( N O _ { 3 } \right) _ { 2 } \rightarrow M g ^ { 2 + } + 2 N O _ { 3 } {/tex}
{tex}\alpha = \frac { i - 1 } { n - 1 }{/tex}
{tex}= \frac { 2.74 - 1 } { 3 - 1 }{/tex}
{tex}= \frac { 1.74 } { 2 }{/tex}
= 0.87
Degree of Dissociation = 0.87 {tex}\times{/tex}100 = 87%

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Write two advantage of H2 O2 fuel cell over ordinary cell

Posted by Aman Thakur 2 days, 12 hours ago

CBSE > Class 12 > Chemistry

3 answers

Bhavya Tiwari 2 days, 8 hours ago

1st is high efficiency over ordinary cell and 2nd is fuel cell don't escape any exhaust and 3rd one is h2o produced by this ,used by astronauts for drinking purpose.

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Bhavya Tiwari 2 days, 8 hours ago

High efficiency over ordinary cell Fuel cell has 2 electrode 1 positive and 1negative (cathode ,anode)

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Guri Lubana 2 days, 12 hours ago

Pata nhi

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Last year campartment exam paper with anser

Posted by Abhishek Shinde 2 days, 16 hours ago

CBSE > Class 12 > Chemistry