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Write the postulatos of VSEPR theory in short.

Posted by Jahangir Alam 4 months, 1 week ago

CBSE > Class 11 > Chemistry

0 answers

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Cr(oh)3– + ho2- = cr2o7²- +oh- redox balance

Posted by Solanki Karan 4 months, 3 weeks ago

CBSE > Class 11 > Chemistry

0 answers

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Molecular formula

Posted by Yash Dhama 5 months, 3 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Harshit Malik ... 5 months, 3 weeks ago

Molecular formula=n×emperical formula.

8Thank You

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CBSE chemistry half yearly exam papers

Posted by Pratik Rajpurohit 5 months, 3 weeks ago

CBSE > Class 11 > Chemistry

0 answers

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What is mole formula

Posted by Shafiur Rahman 5 months, 4 weeks ago

CBSE > Class 11 > Chemistry

4 answers

Pooja Saini 4 months, 2 weeks ago

Mass/ Molar mass is the formula of mole.

Deepanshu Tiwari 5 months, 3 weeks ago

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

Akash Kumar 5 months, 3 weeks ago

What's is the power of electri current

M R 5 months, 3 weeks ago

Nogic

2Thank You

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Case study on how chemistry Is used in space

Posted by Sudeep Reddy 5 months, 4 weeks ago

CBSE > Class 11 > Chemistry

0 answers

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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 5 months, 4 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Peace Parichha 5 months, 3 weeks ago

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State law of chemical equilibrium and equilibrium constant

Posted by Harmeet Kaur 5 months, 4 weeks ago

CBSE > Class 11 > Chemistry

0 answers

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Study of different types of atomic models

Posted by Deepika Kaushik 5 months, 4 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Janhavi Singh 5 months, 4 weeks 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 ago

CBSE > Class 11 > Chemistry

0 answers

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Gay lussac's law kya h? Explain.

Posted by Harshit Malik ... 6 months ago

CBSE > Class 11 > Chemistry

2 answers

Harshit Malik ... 5 months, 3 weeks ago

Thanks 👍

Janhavi Singh 5 months, 4 weeks 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 ago

CBSE > Class 11 > Chemistry

5 answers

Pooja Saini 4 months, 2 weeks ago

6.022×10²³

Harshit Malik ... 5 months, 3 weeks ago

Thanks 🙏🏽👍

Shikha Yadav 6 months ago

6.022×10²³

Akshat Singh 6 months ago

6.022×10^23

Shanu Yadav 6 months ago

6.022*10^23

ANSWER

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

Posted by Sandhya Das 6 months, 1 week ago

CBSE > Class 11 > Chemistry

0 answers

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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, 1 week ago

CBSE > Class 11 > Chemistry

0 answers

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Who gave the concept of first atom?

Posted by Harshit Malik ... 6 months, 1 week ago

CBSE > Class 11 > Chemistry

4 answers

Payal Singhal 6 months ago

Dalton

Harshit Malik ... 6 months ago

Thanks 👍 aap sbhi ko

Ayushi Patel 6 months ago

Dalton

Khushi Chauhan 6 months, 1 week ago

Dalton

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Electronic configuration of fe3+ for class 10

Posted by Anjali Chauhan 6 months, 2 weeks ago

CBSE > Class 11 > Chemistry

2 answers

Shyam Kumar 6 months, 1 week ago

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

Adithya Dev 6 months, 2 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, 2 weeks ago

CBSE > Class 11 > Chemistry

1 answers

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

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 6 months, 2 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 6 months, 2 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 6 months, 2 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 6 months, 3 weeks ago

CBSE > Class 11 > Chemistry

2 answers

Harman Kaur 5 months, 2 weeks ago

Increases

Adithya Dev 6 months, 2 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 6 months, 3 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 6 months, 2 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 6 months, 3 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Nancy 🙂✨ 6 months, 2 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 6 months, 3 weeks ago

CBSE > Class 11 > Chemistry

1 answers

Archana Pal 6 months, 2 weeks ago

For which subject

4Thank You

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Mass of c12 atom of carbon

Posted by Lakshay Raghav 7 months ago

CBSE > Class 11 > Chemistry

4 answers

Bhumika Singh 6 months, 3 weeks ago

1.99×10^ -23 grams

Purushartha Sharma 6 months, 3 weeks ago

1.99*10–23 g

Anushka Singh 6 months, 4 weeks ago

1.99×10^-23g

Ratan Patwa 6 months, 4 weeks 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 ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev 6 months, 4 weeks 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 ago

CBSE > Class 11 > Chemistry

2 answers

Khushi Panwar Gujjar 7 months ago

E=hc/lemda

Abhishek Pandey 7 months 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 ago

CBSE > Class 11 > Chemistry

2 answers

Sanjana Gupta 3 months, 1 week 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 👍

Harshit Malik ... 6 months ago

Empirical formula = n/ molecular formula