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Mass is a scalar quantity and weght is a vector quantity. Mass is independent of gravity whereas weight is dependent on gravity. Mass is the amount of substance contained in the body whereas weight is the force applied by the gravity

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?? ??? 6 years, 8 months ago

Mass cannot be changed if we move anywhere with any gravity but weight can be zero in space at having different acceleration to gravity we can feel weightlessness at at a different acceleration due to gravity

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C6h12 five isomers

Posted by Hahat Simte 6 years, 8 months ago

CBSE > Class 11 > Chemistry

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What is the meaning of sub shell???

Posted by Rahul Mahato 6 years, 8 months ago

CBSE > Class 11 > Chemistry

2 answers

Rambier Vats 6 years, 8 months ago

The shells which are present between the principal shells are known as sub-shells. The sub-shells are s,p,d andf

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Aditya Narayan Singh 6 years, 8 months ago

Mainly:- S ,P ,D ,F

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CH4O+(Cr2O7)^-2+H^+will give CH2O + Cr^+3 + H2O

Posted by Govind Sahu 6 years, 8 months ago

CBSE > Class 11 > Chemistry

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what is mass and weight?

Posted by Gulab Nagri 6 years, 8 months ago

CBSE > Class 11 > Chemistry

2 answers

Sia ? 6 years, 8 months ago

S.No.	Mass	Weight
1.	The mass (m) of a substance is the amount of matter present in it.	Weight is the force exerted by gravity on an object
2.	It is a scalar quantity.	It is a vector quantity.
3.	The mass of a body is constant and does not change from place to place.	The weight of a body is not constant, it changes place to place.
4.	It can not be zero.	It can be zero.
5.	It is measured in kg.	It is measured in Newton(N).

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Sia ? 6 years, 8 months ago

S.No.	Mass	Weight
1.	The mass (m) of a substance is the amount of matter present in it.	Weight is the force exerted by gravity on an object
2.	It is a scalar quantity.	It is a vector quantity.
3.	The mass of a body is constant and does not change from place to place.	The weight of a body is not constant, it changes place to place.
4.	It can not be zero.	It can be zero.
5.	It is measured in kg.	It is measured in Newton(N).

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How would you justify the preswnce of 18 elements in the 5 period of periodic table

Posted by Reena Parveen 6 years, 8 months ago

CBSE > Class 11 > Chemistry

1 answers

Akshita Attri 6 years, 8 months ago

It is because 5th period has sub shell 5s,4d,and5p they have 1,5,3 orbitals so they have 2,10, 6 electrons and when we add them =2+10+6=18 electrons. So, by this we say that period 5has 18 elements

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HOW TO SOLVE NUMERICALS OF CLASS 11TH CHEMISTRY AND HOW TO LEARN CHEMISRTY THEIR ARE TOOO MUCH OF EXPETIONS HOW TO OVERCOME THEM

Posted by Chirag Chaudhary 6 years, 8 months ago

CBSE > Class 11 > Chemistry

2 answers

Kavya?? Verma 6 years, 8 months ago

Learn formulas and do practice it will be quite eaay

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Aditya Narayan Singh 6 years, 8 months ago

Only mantra:- REGULAR PRACTICE

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How to learn the electricconfriguration in very simple methods

Posted by Vaibhav Pratap Singh 6 years, 8 months ago

CBSE > Class 11 > Chemistry

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What is electricconfriguration?

Posted by Vaibhav Pratap Singh 6 years, 8 months ago

CBSE > Class 11 > Chemistry

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Abhay Anjaan 6 years, 8 months ago

The distribution of electron into orbitals of an atom is called electronic configuration

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Yogita Ingle 6 years, 8 months ago

Electronic configuration is defined as the distribution of electrons into various orbitals of an atom by using three principles.

Aufbau principle states that in the ground state of the atoms the orbitals are filled in order of their increasing energies. Electrons first occupy the lowest-energy orbital and then enter into successive higher energy orbitals. The electrons enter into various orbitals in an increasing order of (n+l).

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What's the plane motion in the orbit

Posted by Chander Mohan Maan 6 years, 8 months ago

CBSE > Class 11 > Chemistry

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As per as Rutherford alpha particle scattering experiment 99% atom is empty also everything is made of atom then why don't everything shrink to 1 %

Posted by Ansh Kaushik 6 years, 8 months ago

CBSE > Class 11 > Chemistry

2 answers

Keeratan Patel 6 years, 8 months ago

Because due to is density

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Medhya☺️☺️☺️ Mittal??? 6 years, 8 months ago

Because it contains orbitals

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How many atoms are in 1l of water

Posted by Vanshika Agarwal 6 years, 8 months ago

CBSE > Class 11 > Chemistry

2 answers

Sia ? 6 years, 8 months ago

One liter of water has 1000 grams.
Number of moles is {tex}\frac{1000}{18}{/tex} = 55.556 moles.
The number of molecules is therefore 6.022{tex}\times{/tex}10²³ {tex}\times{/tex} 55.556 = 3.346 {tex}\times{/tex} 10²⁵ molecules.
The number of atoms is 3 times larger because each molecule has three atoms, so there are 1.0038{tex}\times{/tex}10²⁶ atoms in a liter of water.

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Atharv Raj 6 years, 8 months ago

1L=1000gH2O Mass of 1 mole H2O= 1*2+16=18g No. Of moles in 1000gH2O= 1000/18=50.5moles(approx) No. of atoms present in 50.5 moles=50.5*6.022*10²³=???answer

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Derivation of relationship between molarity and morality

Posted by Shashi Bhushan Verma 6 years, 8 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 8 months ago

Molality (m) : It is the number of moles of the solute dissolved per kilogram (kg) of the solvent. It is denoted by m.
{tex}\therefore{/tex} Molality (m) {tex} = \frac{{{\text{No}}{\text{. of Moles of solute}}}}{{{\text{Mass of solvent in kg}}}}{/tex}
{tex}\therefore \,m = \frac{{{W_2} \times 1000}}{{{M_2} \times {W_1}}}{/tex}
Where W₁= mass of solvent
W₂ = mass of solute
M₂ = Molar mass of solute . Unit is mol/Kg
Molarity (m): It is the number of moles of the solute dissolved per litre of the solution. It is denoted by M.
Molarity {tex} = \frac{{{\text{No}}{\text{. of moles of solute}}}}{{{\text{Volume of solution in litre}}}}{/tex}
{tex}\therefore \;M = \frac{{{W_2} \times 1000}}{{{M_2} \times {V_1}}}{/tex}
where W₂ = mass of solvent
M₂ = molar mass of solute
V = Volume of solution. Unit is mol/L
The molarity and molality of a solution will be nearly same if the mass of solvent is nearly equal to the volume of solution.

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Calculate the number of electrons which will together weigh one gram

Posted by Tushar Verma 6 years, 8 months ago

CBSE > Class 11 > Chemistry

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Sia ? 6 years, 8 months ago

Mass of an electron = 9.1 {tex}\times{/tex} 10^-28 g
9.1 {tex}\times{/tex} 10^-28 g is the mass of = 1 electron
1.0 g is the mass of = {tex}\frac{1}{9.1 \times 10^{-28}}{/tex}= 1.098 {tex}\times{/tex}10²⁷ electrons

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Nacl +hcl gives what?

Posted by Kharvawada-39 Diu 6 years, 8 months ago

CBSE > Class 11 > Chemistry

1 answers

Medhya Agrawal?? 6 years, 8 months ago

Nothing

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Why alkali metals gives blue solution when it reacts wirh amonia?

Posted by Kabaddi Fan 6 years, 8 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 8 months ago

Alkali metals dissolve in ammonia to form a blue colour solution. The blue colour of the solution is due to ammoniated electron which absorbs energy in the visible region of light and imparts blue colour to the solution.
M + (x + y)NH₃ →[M(NH₃ )_x ]⁺ + [e(NH₃ )_y ]⁻

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Find the wavelength of the moving electron

Posted by Netu Devi 6 years, 8 months ago

CBSE > Class 11 > Chemistry