CBSE > Class 11 > Chemistry | CBSE Board | Homework Help

Brother there are three formulas to find moles(n) The first one is :- n = given weight / mol. Weight The second one is :- n = no of particles/Na And the third one is :- n = volume of gas/22.4 l

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Akash Kumar 6 months ago

What's is the power of electri current

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M R 6 months, 1 week ago

Nogic

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Case study on how chemistry Is used in space

Posted by Sudeep Reddy 6 months, 1 week ago

CBSE > Class 11 > Chemistry

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A compound is found to contain 23.3% magnesium, 30.7% sulphur, and 46.0% oxygen. What is the empirical formula of this compound? [ATOMIC MASS OF Mg, S and O : 24u,32u,and 16u respectively

Posted by R Padmavathi 6 months, 1 week ago

CBSE > Class 11 > Chemistry

1 answers

Peace Parichha 6 months, 1 week ago

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State law of chemical equilibrium and equilibrium constant

Posted by Harmeet Kaur 6 months, 1 week ago

CBSE > Class 11 > Chemistry

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Study of different types of atomic models

Posted by Deepika Kaushik 6 months, 1 week ago

CBSE > Class 11 > Chemistry

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Janhavi Singh 6 months, 1 week ago

The different types of atomic models are:- 1)Rutherford atomic theory 2)The Bohr atomic model 3)Atomic models 4)Modern atomic model 5)Atom 6)Electron cloud model 7)Plum pudding model

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(Pressure volume work) derivation solve it. And explain.

Posted by Harshit Malik ... 6 months, 2 weeks ago

CBSE > Class 11 > Chemistry

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Gay lussac's law kya h? Explain.

Posted by Harshit Malik ... 6 months, 2 weeks ago

CBSE > Class 11 > Chemistry

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Harshit Malik ... 6 months ago

Thanks 👍

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Janhavi Singh 6 months, 1 week ago

Gay-Lussac's law states that the pressure of a gas is directly proportional to the absolute temperature provided mass & volume of gas is constant. At constant volume, the pressure of the gas increases with increase in temperature and decreases with a decrease in temperature which is expressed as: PαT -------- (at constant volume & mass)

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1 mole m kitne Avogardo no. Hote h ??

Posted by Harshit Malik ... 6 months, 2 weeks ago

CBSE > Class 11 > Chemistry

5 answers

Pooja Saini 5 months ago

6.022×10²³

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Harshit Malik ... 6 months ago

Thanks 🙏🏽👍

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Shikha Yadav 6 months, 2 weeks ago

6.022×10²³

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Akshat Singh 6 months, 2 weeks ago

6.022×10^23

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Rachit Yadav 6 months, 2 weeks ago

6.022*10^23

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Calculate the wave no. of He+2 when transition is formed and n2=2 and n1=1

Posted by Sandhya Das 6 months, 2 weeks ago

CBSE > Class 11 > Chemistry

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Tell me about, (1) J.J Thomson model. (2) Rutherford model. (3) Bohr's model....

Posted by Harshit Malik ... 6 months, 3 weeks ago

CBSE > Class 11 > Chemistry

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Who gave the concept of first atom?

Posted by Harshit Malik ... 6 months, 3 weeks ago

CBSE > Class 11 > Chemistry

4 answers

Payal Singhal 6 months, 1 week ago

Dalton

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Harshit Malik ... 6 months, 2 weeks ago

Thanks 👍 aap sbhi ko

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Ayushi Patel 6 months, 2 weeks ago

Dalton

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Khushi Chauhan 6 months, 2 weeks ago

Dalton

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Electronic configuration of fe3+ for class 10

Posted by Anjali Chauhan 6 months, 3 weeks ago

CBSE > Class 11 > Chemistry

2 answers

Shyam Kumar 6 months, 3 weeks ago

But it's not class 10.... this is from class 11 type

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Adithya Dev 6 months, 3 weeks ago

1s2 2s2 2p6 3s2 3p6 3d4 4s0

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Class 11 ch 8 redox reaction notes

Posted by Bhaumik Rai 6 months, 4 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Harshit Malik ... 6 months, 2 weeks ago

Yes mere pass m h Redox chapter k notes

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What will be the molarity of the solution which is obtained by dissolved 2g of Naoh in deciliter of its aqueous solution

Posted by Priyanshi Kathayat 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 6 months, 3 weeks ago

No of moles = 2g /40g = 1/20 = 0.05 mol. // Volume given = 1 decilitre = 1/10th L. Therefore, molarity M = 0.05 / (1/10) = 0.05 × 10 = 0.5 mol/L.//

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How to find atomic radii?

Posted by Vaishnavi B 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 6 months, 3 weeks ago

Well, varies. If you want to find for unbonded atoms, you may have to consider Vander Waal's radius. For covalently bonded atoms, it is covalent radius, for metallic lattices, it is metallic radius. All have the same formulae which is half the intermolecular distance but the difference comes in their ranges. Generally, Vander Waal's > Metallic > Covalent > Ionic radii.

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Define entropy what happens to the entropy when liquid changes into vapour

Posted by Shifa Shifa 7 months ago

CBSE > Class 11 > Chemistry

2 answers

Harman Kaur 6 months ago

Increases

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Adithya Dev 6 months, 3 weeks ago

Entropy is the measure of disorder or, kinetic freedom of particles in a system. When from liquid to vapour, disorder increases, so the entropy also increases.

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A compound is found to contain 54.67% of carbon 9.1% of hydrogen and the remaining is oxygen. Vapour density of the compound is 22. Calculate its molecular formula

Posted by Sai Akshara 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 6 months, 3 weeks ago

No of moles of C = 54.67 (out of 100g) / 12 = 4.5 . No of moles of H = 9.1 / 1 = 9.1 . No of moles of O = (100 - 63.77) / 16 = 2.25 . Therefore, ratio of empirical formula = C:H:O = 2:4:1 . So, empirical formula = C2H4O (Mass = 24 + 4 + 16 = 44) So, N = M/EM = 2 × 22/44 = 1.// Therefore, molecular formula = C2H4O. //

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Define accuracy

Posted by Gourav Tanwar 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Nancy 🙂✨ 6 months, 3 weeks ago

Accuracy is the degree of closeness between a measurement and it's true value

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Please guide me how should I prepare for chp 3 for my half early exam?

Posted by Khushi Patel 7 months, 1 week ago

CBSE > Class 11 > Chemistry

1 answers

Archana Pal 7 months ago

For which subject

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Mass of c12 atom of carbon

Posted by Lakshay Raghav 7 months, 1 week ago

CBSE > Class 11 > Chemistry

4 answers

Bhumika Singh 7 months ago

1.99×10^ -23 grams

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Purushartha Sharma 7 months, 1 week ago

1.99*10–23 g

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Anushka Singh 7 months, 1 week ago

1.99×10^-23g

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Ratan Patwa 7 months, 1 week ago

144

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How can 1 mole of carbon (12gms) when burnt in air, can produce 1mole of carbondioxyde (44gms)? If so, then why it is not proving the Law of Conservation of Mass (12gms to 44gms)?

Posted by Shabd Sarthak 7 months, 2 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 7 months, 1 week ago

It is possible, but you aren't able to comprehend the question. Air in which it is burnt does contain O2 which reduces carbon to CO2. So you must involve O2 as a reactant in the reaction. Now, check the LHS, we get 12g (C) + 32g (O2) = 44g = Mass of CO2 in RHS. Law of conservation of mass never has been wrong except in radioactive decays.

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Definition of de broglie equations

Posted by Ajay Nagar 7 months, 2 weeks ago

CBSE > Class 11 > Chemistry

2 answers

Khushi Panwar Gujjar 7 months, 1 week ago

E=hc/lemda

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Abhishek Pandey 7 months, 2 weeks ago

What is there 8 elements in 2 nd period

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How to find empirical formula

Posted by Arpita G 7 months, 2 weeks ago

CBSE > Class 11 > Chemistry

2 answers

Sanjana Gupta 3 months, 3 weeks ago

I recommended easy very way First you convert % In gram And then find no. Of mole and after you find the mole divide at small no. And you give a no. According to need multiply by 2 agar less than 1 haa too And finally you give a empirical formula after adjusting the number In a given element 👍

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Harshit Malik ... 6 months, 2 weeks ago

Empirical formula = n/ molecular formula

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Chapter 2 quiz test

Posted by Ram Harsh Pandey 7 months, 2 weeks ago

CBSE > Class 11 > Chemistry