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

The empirical formula of a compound is defined as the formula that shows the ratio of elements present in the compound, but not the actual numbers of atoms found in the molecule. The ratios are denoted by subscripts next to the element symbols.

The empirical formula is also known as the simplest formula because the subscripts are the smallest whole numbers that indicate the ratio of elements.

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What is the ratio of kinetic energy,potential energy and total energy?

Posted by Avika Bagh 6 years, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Shaunak Rananaware 6 years, 3 months ago

The ratio of kinetic energy + potential energy to that of the total energy is 1:1.

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Explanation of thomson model of atom

Posted by Mohd Kaif 6 years, 3 months ago

CBSE > Class 11 > Chemistry

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Sam Bhardwaj 6 years, 3 months ago

U can see this on u tube or google also

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What are polyatomic ion

Posted by Astha Gautam 6 years, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

The Hammer 6 years, 3 months ago

You can also see here ?https://youtu.be/pFpYo8PXWSE

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The Hammer 6 years, 3 months ago

polyatomic ion, is as a molecular ion, is a charged chemical species composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single uni

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Notes on gases air pollutants

Posted by Smoky Haokip 6 years, 3 months ago

CBSE > Class 11 > Chemistry

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Rutherford nuclear of atom

Posted by Ujjval Purohit 6 years, 3 months ago

CBSE > Class 11 > Chemistry

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Priya Parjapati 6 years, 3 months ago

This year rutherford is cut off from syallbus

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Drawback of Rutherfords experiment?

Posted by Srihari Kishore Kishore 6 years, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Gaurav Seth 6 years, 3 months ago

Drawbacks of Rutherford’s Model of an Atom

·Rutherford’s atomic model could not explain how the moving electrons could remain in its orbit.

·Any charged particle during acceleration would give out energy; and while revolving it would lose energy and eventually fall into the nucleus.

·This means that the atom would be highly unstable.

·But, matter is composed of stable atoms.

·Thus, the major drawback of Rutherford’s atomic model was that it could not explain the stability of atoms.

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What is work function?

Posted by Srihari Kishore Kishore 6 years, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Tanashri Wagh 6 years, 2 months ago

Energy required to eject an electron from metal surface

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Harsh Mishra 6 years, 3 months ago

The energy used to remove electron

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Combustion enthalpy of diamond is -395.4 and of graphite is -393.4 KJ . Calculate transition enthalpy of diamond to graphite

Posted by E T E R N A L E 6 years, 3 months ago

CBSE > Class 11 > Chemistry

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Syllabus of half yearly exam chemistry

Posted by Shrishyam Mishra 6 years, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Shrishyam Mishra 6 years, 3 months ago

My school fallow only cbse (J.N.V.)

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Jiya Arora????? 6 years, 3 months ago

It's different for all schools

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Prove that oxygen has double bonded or paramagnetic nature by MOD

Posted by Vikshit Tomar Biku 6 years, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Ravi Kumar 6 years, 3 months ago

It have 2e- in outer most orbital so share both of 2e- for making O2 Paramagnetc means which have lone pair and after bonding oxygen have 2 lone pair e- so oxygen is paramagnetic in nature

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1g co2 contains how many carbon atoms?

Posted by Seerat Singh 6 years, 3 months ago

CBSE > Class 11 > Chemistry

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Chemistry practical 1

Posted by Govind Gupta 6 years, 3 months ago

CBSE > Class 11 > Chemistry

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Define isotopes and isobars?

Posted by Allrounder King 6 years, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Abd Divilliars 6 years, 3 months ago

Isotopes - Same atomic number but different atomic mass

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Astha Gautam 6 years, 3 months ago

Isotopes .. Atoms of same element which have same atomic no. But different mass no Isobars ..atoms of different element having same mass no. But different atomic no.

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Define and also explain lattice

Posted by Monika Mann 6 years, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Iitian Satyam Maurya 6 years, 3 months ago

Have any problem in chemistry then you tell me

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Iitian Satyam Maurya 6 years, 3 months ago

It is a energy required to dissociate one mole of one mole of ionic compound into its consituante ions

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Why we use orditals and subshell in atom to filling electron.

Posted by Sumit Singh 6 years, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Astha Gautam 6 years, 3 months ago

To determine the correct position of electron we use orbitals and subshell

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Energy level diagram for dioxygen na florine

Posted by Saksham Parashari 6 years, 3 months ago

CBSE > Class 11 > Chemistry

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Any one can help me in chemistry ,?

Posted by Purvi Diwakar 6 years, 3 months ago

CBSE > Class 11 > Chemistry

5 answers

Iitian Satyam Maurya 6 years, 3 months ago

Take my what's up no. I am prepare for iit in kota rajasthan

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Aarohi Singh 6 years, 3 months ago

Yeah obviously?

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Gaurav Kumar 6 years, 3 months ago

Yaa off course ?

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Iitian Satyam Maurya 6 years, 3 months ago

Chemistry is too easy don't worry

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Iitian Satyam Maurya 6 years, 3 months ago

Yes why not

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How many atoms of Oxygen are present in 5 moles of O2

Posted by Harshmeet Kaur 6 years, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Ã.P.W.B.Đ ⚡ 6 years, 3 months ago

Since it is the O2 molecule mentioned in the question, so There are 5 moles of O2 molecules. In each molecule-2 atoms of oxygen so in 5moles-2×5moles=10moles of O atoms. Hence, no. of O atoms will be 10×6.022×10^23 =6.022×10^24atoms of oxygen.

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Amisha Aman 6 years, 3 months ago

Moles =5 No of oxygen atoms = 5 × 6.022× 10^23

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The first four ionization energy values of an element are 191, 578, 878 and 5962 k calories respectively the number of Valence electrons in the element is A)1 B)2 C)3 D)4

Posted by Samaksh Rastogi 6 years, 3 months ago

CBSE > Class 11 > Chemistry

2 answers

Tanashri Wagh 6 years, 2 months ago

C)3

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Amisha Aman 6 years, 3 months ago

C)3

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How understand prediction of elements?

Posted by Afsar Imam 6 years, 3 months ago

CBSE > Class 11 > Chemistry

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Which is most ionic

Posted by Ayush Bhardwaj 6 years, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 3 months ago

Because of Cs being most electropositive and F being most electronegative, the electronegativity difference is largest. Hence, they are easily separable. Hence, CsF is most ionic, least stable compound. In case of KF, the electronegativity difference is smaller.

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Will volume of water in a glass increase when we put some ice cubes in it??

Posted by Harkirat Singh Bhangu 6 years, 3 months ago

CBSE > Class 11 > Chemistry