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The energies of electrons are said to be quantized. Explain.

Posted by Suman Jakhar 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Preeti Dabral 3 years, 5 months ago

Classical mechanics fails when applied to microscopic objects like electrons, atoms and molecules, etc. This is because the classical mechanics ignores the concept of dual nature of matter. The branch of science that takes into account this dual behaviour of matter is called quantum mechanics.The absorption and emission spectra of hydrogen like atom explained by Bohr theory is the experimental evidence in support of the idea that electronic energies in an atom are quantized. The various line obtained in the spectrum of hydrogen (Lyman,. Balmar, Paschan , Brackett and Pfund series) are based on the assumption of electronic energies in an atom are quantized.

ANSWER

Calculate number of photon present in light of E=3ev, Wavelength=2000Angstorm

Posted by Piyush Sharma 3 years, 5 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

How many significant figures in 5×5.364

Posted by Elizabeth George 3 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Prajwal Pandey 3 years, 5 months ago

4

Adithya Dev A 3 years, 5 months ago

4.

ANSWER

Atomic number of rb is less than that of

Posted by Om Patel 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Preeti Dabral 3 years, 5 months ago

Rubidium is the chemical element with the symbol Rb and atomic number 37.

ANSWER

Please tell me: 1 How to clear backlogs? 2 How to manage your time as a lot of time is wasted in copying notes 3 How to be motivated and confident about my preparation? ??????????

Posted by Akhya Sahay 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

, 🙂 3 years, 5 months ago

Sleep well

ANSWER

Calculate weight of hydrogen gas produced when 85gm of NH3 is heated

Posted by Saswat Patro 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Rahul Nadagoud 3 years, 5 months ago

Molar mass of NH3=17 gm In 17gm of NH3=3gm of hydrogen In 85gm ofNH3=? 85×3÷17=15 gm

ANSWER

Calculate the percentage composition of the following components 1. CuSO4. 4H2O

Posted by Swapnil Tiwari 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Anurag Singh 3 years, 5 months ago

CuSo4---- calculate over all mas 4H2O------ calculate over all mas Divide 1 element mass present in compound by over all mass of compound and then multiply by 100 to get percentage

ANSWER

Explain periodic table and draw diagram also

Posted by Mandeep Kaur 3 years, 5 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Calculate the wavenumber and frequency of yellow radiation having wavelength 5800A°

Posted by N.S.Ganesh Sivamohan 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Khushi Yadav 3 years, 5 months ago

Wave number= 1.72×10^6m^-1 Frequency= 1.5172×10^14s^-1

ANSWER

Calculate molecular mass of glucose c6h12o6 molecule

Posted by Kamna Sharma 3 years, 5 months ago

CBSE > Class 11 > Chemistry

3 answers

Rahul Nadagoud 3 years, 5 months ago

C=12×6=72u H=12u,. O=16×6=96u Total molecular mass=72+12+96=180u

Khushi Yadav 3 years, 5 months ago

180u

Ishita Rana 3 years, 5 months ago

180.56

ANSWER

Want example of law of conservation of mass

Posted by Pujan Patel 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Nidhi Kashyap?? 3 years, 5 months ago

Mass can neither be created nor be destroyed

ANSWER

Calculate the mass and charge of one mole of electron

Posted by Deepika Tamta 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Khushi Yadav 3 years, 5 months ago

Charge of electron= 1.6×10^-19×6.022×10^23 = 9.6352×10^4 Mass of electron= 9.1×10^-31×6.022×10^23 = 5.48008×10^-7

ANSWER

A gas at 350 K and 15 bar has molar volume 20 percent smaller than that for an ideal gas under the same conditions. The correct option about the gas and its compressibility factor (Z) is :

Posted by Suriya Prakash 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Pavneet Kaur Sahota 3 years, 5 months ago

.

ANSWER

What quantities of two samples of superphosphate, one containing 14 and the other 22 per cent of P20 5, should be mixed to prepare 400 kg of the fertilizer containing 20 per cent of P20 5? What is the ratio of the two samples in the mixture?

Posted by Suriya Prakash 3 years, 5 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

What did Rutherford conclude from the observations of a-ray scattering experiment?

Posted by Himanshu Rajput 3 years, 5 months ago

CBSE > Class 11 > Chemistry

2 answers

Adithya Dev A 3 years, 5 months ago

A correction, 1) most alpha rays pass straight through atom. 3) 1/12000 alpha rays. Sorry.

Adithya Dev A 3 years, 5 months ago

1) Most of the α - rays emerged out of the gold foil with large amount of scattering indicating that most of the space inside a gold atom is empty. 2) A few α - rays suffered a small amount of deviation indicating that something which is positive in charge is situated at inside every gold atom. 3) 1 out of every 2000 rays came out of the gold foil undeviated retracing the path indicating that all positive charges present in an atom is accumulated at a very small volume inside the atom.

ANSWER

The multiple 5*0.2 after rounding off will be

Posted by Monu Gothwal 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Monu Gothwal 3 years, 5 months ago

1

ANSWER

The multiple after rounding off will be

Posted by Monu Gothwal 3 years, 5 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

How does molarity and molality depends on temperature

Posted by Lakshay Tyagi 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev A 3 years, 5 months ago

When temperature increases, the molarity decreases.

ANSWER

If 0.85g of NH3 is dissolved in 100ml of solution find molarity if density of solution is 1.2g/ml

Posted by Komal Bharti 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Adithya Dev A 3 years, 5 months ago

Molar mass (M2) = 14 + 3 = 17 g// Therefore, M = (W2/ M2 * V) * 1000 = (0.85/ 17 * 100) * 1000 = 0.5 mol/L//

ANSWER

If mass of 1 atom is 3.32×10^-23g, then calculate the number of nucleons present in 2 atom of the element

Posted by V. Poojitha 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Lakshay Tyagi 3 years, 5 months ago

Don't know

ANSWER

equivalent weight of metal is 12 . weight of its chloride is

Posted by Dhanvi Sharma 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Khushi Yadav 3 years, 5 months ago

24

ANSWER

Calculate the energy of mole of photon of radiation where f is 5×10^14 Hz

Posted by A Sh. 3 years, 5 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

What is the order of -I effect

Posted by Shakshi Rana 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 3 years, 5 months ago

Often in experimental studies, researchers will have participants provide responses to several different treatments. In these types of studies, order effects refer to differences in participant responses as a result of the order in which treatments are presented to them.

ANSWER

Chemistry 2 part book

Posted by Simran . 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Niraj Shaw 3 years, 5 months ago

Kon sa book? ??

ANSWER

One mole of any substance contains 6.022 x 1023 atoms/molecules. Number of molecules of H2S04 present in 100 mL of 0.02 M H2S04 solution is __________

Posted by Peter O'Connell 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 3 years, 5 months ago

Moles of H₂SO₄= Molarity of H₂SO₄× Volume of solution (L)

=0.02×0.1

=2×10−3 moles

No. of H₂SO₄ molecules =2×10−3×6.022×1023=12.044×1020 molecules

ANSWER

How 1amu=1.66*10^-24

Posted by Gourav Kumar 3 years, 5 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

(-).^ / \ / \ /----------\ /--------------\ Aromatic or not

Posted by Sabari Krishna 3 years, 5 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Why do alkali metals give blue colour when dissolved in liquid ammonia?

Posted by Eyahiya Ahmed 3 years, 5 months ago

CBSE > Class 11 > Chemistry

1 answers

Sweta Jha 3 years, 5 months ago

Because alkali metals are generally basic in nature.

ANSWER

At NTP , what will be the volume of molecules of 6.022× 10*23

Posted by Anshika Kumari 3 years, 5 months ago

CBSE > Class 11 > Chemistry

5 answers

Mohak Prakash 3 years, 5 months ago

Nahin hai koi explanation ?

Ani G 3 years, 5 months ago

First convert it into moles . In order to convert it into moles divide it by Avogadro number then you will get 1 mole. As you know that 1mol= 22.4 litres .

Anshika Kumari 3 years, 5 months ago

Aditya Dev A I plz tell me in detail with solution

Adithya Dev A 3 years, 5 months ago

22.4 litres = 22400 ml.

Anshika Kumari 3 years, 5 months ago

Explain in details plz

ANSWER

Chemistry mein kuch samajh nahi aa raha hai.....koi batado kaise phado is subject ko....please

Posted by Mary Stuart 3 years, 6 months ago

CBSE > Class 11 > Chemistry

5 answers

Atharva Verma 3 years, 5 months ago

Padhai karte rahein all the very best ?

Yashika Chauhan? 3 years, 6 months ago

Ary kuch nahi bas ap chapter ko 2ya 3times pdlo only and only ncert then make a mind mape and paste it on your study table then may you understand the chemisrty Hope you like this ?

Vanshika Sharma 3 years, 6 months ago

Arey kuch nhi hai bas aap ch ko 2, 3 times padho or fir ek youtube channel hai physicswallah bo chemistry ke ch bhi padhata hai to aap vaha se padh lo??

Khushi Tiwari 3 years, 6 months ago

Don't worry "Mary Stuart " meri bhi problem aisi hi thi par ye isiliye hota h kyuki hamare basics clear nhi hote isiliye iss may month mai sabse pehle apne basics clear karo

Shweta Palwe 3 years, 6 months ago

Lunch meat Karen Sarah kar

ANSWER

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