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Numericals of mole fraction

Posted by Mayank Sharma 1 year, 3 months ago

1 answers

Tejas T. 1 year, 2 months ago

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Electrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800 a calculate thress hold frequency we not and work function wnote of the metal

Posted by Riya Chand 1 year, 3 months ago

CBSE > Class 11 > Chemistry

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How electron lose,gain and share?

Posted by Aleena Ss 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 1 year, 3 months ago

When no of electrons in the valence shell is less than 4, then, these electrons have a tendency to be lost from the atom so that the atom can attain the nearest (penultimate shell) octet. When no of electrons is greater than 4, there is a tendency that the atoms gain electrons in their neighborhood to attain nearest (valence shell) octet. But, when no of valence electrons is equal to 4, gaining 4 electrons is a matter outside the control of the nucleus and losing 4 electrons causes huge energy loss to the molecule, disturbing it's thermodynamic stability. So, here electrons are just shared, and not completely transferred as in the previous cases.

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Calculate the molarity of a solution containing 5g of NaOH in 450ml solution

Posted by Sarveshaa Ss 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 1 year, 3 months ago

M = Wb/Mb V(L) = 5 ×1000/40×450 = 0.27 M. //

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Determine the empirical formula of an oxideof iron,which has 69.9% iron and 30.1% dioxygen mass

Posted by Drishti Sharma 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Anjan Karthi 1 year, 3 months ago

n(Fe) = 69.9/56 = 1.24. n(O2) = 30.1/32 = 0.94. Therefore, n(Fe) / n(O2) = 1.3 : 1. Therefore, Empirical formula = FeO (nearly).

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What are the frequency and wavelength of a photon emitted during a transition from = 5 state to the n = 2 state in the hydrogen atom?

Posted by Tamanna Tirkey 1 year, 3 months ago

CBSE > Class 11 > Chemistry

1 answers

Paras Rawat 1 year, 3 months ago

Frequency=6.91

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Nitrogen oxide compound name

Posted by Pranshu Patel Patel 1 year, 4 months ago

CBSE > Class 11 > Chemistry

4 answers

Anshika Gupta 1 year, 3 months ago

Nitric oxide

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Bhavya Garg 1 year, 4 months ago

Hello

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Rishita Saw 1 year, 4 months ago

Nitric oxide

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Pranshu Patel Patel 1 year, 4 months ago

Sir

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Write about de brogile

Posted by Mohd Arsalan 1 year, 4 months ago

CBSE > Class 11 > Chemistry

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Write about Discovery of electrons

Posted by Anushya G 1 year, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Abhipsa Behera 1 year, 4 months ago

Electrons:They are the negatively charged subatomic particles that were discovered by scientist J.J. Thomson in the cathode ray-discharge tube experiment. J.J. Thomson's Cathode Ray Experiment:In this experiment, he used a special hard, cylindrical glass tube known as a discharge tube that consists of two, metal plates.These metal plates were called electrodes, each sealed at the two ends of the tube.These metal plates are connected to the terminals of a high-voltage battery.The metal connected to the positive terminal is called the anode and the metal plate connected to the negative terminal is called the cathode.A vacuum pump is connected to one side of the tube to lower the pressure inside the tube.Very high voltage electricity through the discharge tube was passed at very low pressure. Observations:From the experiment, he observed that a continuous beam of rays was emitted.A green fluorescent glow was observed at the end of the tube.They were found moving from the cathode region to the anode region. This proved that these rays consisted of negatively charged particles and these particles were called electrons.

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How to convert gram into mole

Posted by Omm Prakash 1 year, 4 months ago

CBSE > Class 11 > Chemistry

2 answers

Kanchan Gadwal 1 year, 3 months ago

Mole= mass/atomic weight For example Convert 56g of water into moles 56/18 = 3

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Omm Prakash 1 year, 4 months ago

Answe

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Do you think Mourad knew what he was doing when he took away the horse? What may be his mental status at that time?

Posted by Deepshika Das 1 year, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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Redox reaction in acidic medium

Posted by Jasmine Bhardwaj 1 year, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is the metallic bond

Posted by Mohhamad Aman 1 year, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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4.2g of Sodium Carbonate is added to a solution of acetic acid which is of 10g and it is observed that 2.2g of Carbon Dioxide is released to atmosphere and residue left 10g . Show that data illustrates law of conservation of mass.

Posted by Utkarsh Mishra 1 year, 4 months ago

CBSE > Class 11 > Chemistry

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a mixture of 24 DM cube of hydrogen and 100 DM cube of oxygen what incident and reaction mixture was a colder to the room temperature and press what will be volume of gas meaning of end of the reaction

Posted by Tarun Bhati 1 year, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Ayush Kumar 1 year, 4 months ago

Not

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3 moles of N2 combines with 5 moles of H2 to form NH3 by haber's process. 1) which is limiting reagent? 2) calculate the grams of reactant left in container. 3) how many moles of NH3 are produced?

Posted by Asmi Sharma 8 months, 2 weeks ago

CBSE > Class 11 > Chemistry

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3 moles of N2 combines with 5 moles of H2 to form NH3 by haber's process. 1) which is limiting reagent? 2) calculate the grams of reactant left in container. 3) how many moles of NH3 are produced?

Posted by Asmi Sharma 1 year, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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Find the fraction of solute and solvent when0.49g of sulphuric acid is mixed with 9g of water

Posted by Putta Monika2 1 year, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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What is importants of chemistry?

Posted by Rahul Suthar 1 year, 4 months ago

CBSE > Class 11 > Chemistry

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How many grams of NaOH should we added to water to prepare 250 ml solution of 2M Naoh

Posted by Stuti Shetty 1 year, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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Conversion of ethane to methane

Posted by Amit Kumar 1 year, 4 months ago

CBSE > Class 11 > Chemistry

0 answers

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Calculate the wavelength for the shortest wavelength transaction in the balmer series.

Posted by Roshni Gupta 1 year, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Mehraj K 1 year, 4 months ago

Hi roshni

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H2 or o2 dono gas h aur dono fire produce karti H2 o2 product hota h2O hota h aur vo fire ko bhujane madad krta hai

Posted by Pratham Aggrwal 1 year, 4 months ago

CBSE > Class 11 > Chemistry

1 answers

Arusmita Priyadarshani 1 year, 4 months ago

While hydrogen and oxygen combustion produces a significant amount of heat and sustains the fire , the introduction of water vapor can help in extinguishing the fire by absorbing heat, displacing oxygen and actions a barrier. ☺

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How to find normality

Posted by Srishti Thakur 1 year, 4 months ago

CBSE > Class 11 > Chemistry