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A hydro carbon contains 85.7 percent carbon if 42 mili g of compound contains 3.01×10²⁰ molecules what is the molecular formula

Posted by Grishma Barde 3 years, 4 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Sia ? 3 years, 4 months ago

First, assume the hydrocarbon is CxHy. Find the Mr, so that we can find the value of x. With Mr and x, we can find the value of y. So the molecular formula of the hydricarbon compund is C⁶H¹².
Remember some formulas:
n = m/Mr
molecules = n x 6.02 x 10²³
Mr = molecular mass
Ar = atomic mass. Ar C = 12, Ar H = 1

6Thank You

ANSWER

What is difference between molality and molarity please explain??

Posted by Shweta Palwe 3 years, 6 months ago

Entrance Exam > NEET-UG > Chemistry

4 answers

Fatima Zohar 3 years, 5 months ago

Please

Fatima Zohar 3 years, 5 months ago

Question puchna hai mujhe aapse question Kiya hai English ka aap batayenge koi aisa number 33 ka photo click chahie 5th standard

4Thank You

Fatima Zohar 3 years, 5 months ago

Radhika Chourey 3 years, 6 months ago

MolarityMolality 1. The number of moles of solute present in per liter of solution.1. The number of moles of solute present in 1kg of solvent. 2. It depends on volume.2. It depends on mass. 3. Volume changes with temperature, hence it is temperature dependent.3. It depends on mass which is independent of temperature. To convert Molality value into Molarity value, we have to use the following formula:- m=1000×(d−M)×Mb1000×M or, M=(m×Mb)+1d where, M: molarity, m: molality, d: density, Mb: Molecular mass.

5Thank You

ANSWER

what is inductive effect? explain +I and -I with suitable example.

Posted by Pruthviraj Shirsath 3 years, 7 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Sia ? 3 years, 7 months ago

Inductive effect in simple terms is the result of permanet dipole produced due to polarity of the sigma bond developed due to difference in electronegativity.
This causes a permanent state of bond polarization, where the more electronegative atom has a slight negative charge ({tex}\delta{/tex}-) and the other atom has a slight positive charge ({tex}\delta{/tex}+)

ANSWER

The most stable carbocation amongst the following is Ch2=CH-CH2 , CH3-CH2-CH2^+ , cyclo propene ^+

Posted by Muskan Yadav 3 years, 7 months ago

Entrance Exam > NEET-UG > Chemistry

2 answers

Nishant Sharma 3 years, 5 months ago

Cyclopropene+

Anika Mukhtar 3 years, 6 months ago

Cyclopropene

ANSWER

What is meant by fertilisation ? List the steps acording to formation of embryo

Posted by Little Legend 3 years, 8 months ago

Entrance Exam > NEET-UG > Chemistry

2 answers

Manju Jalal 3 years, 8 months ago

Please halp me

3Thank You

Harshada Mehetre 3 years, 8 months ago

Fertilisation is fusion of haploid sperm and haploid ovum to form diploid zygote.

ANSWER

Bhotnike

Posted by Krish Pandey 3 years, 9 months ago

Entrance Exam > NEET-UG > Chemistry

0 answers

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Osmosis occur in

Posted by Absaar Mor 3 years, 10 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Ziya Rehaman 3 years, 10 months ago

Living cells only

5Thank You

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Hydrogen bomb is prepared by the fusion of ?

Posted by Vallavan Vaalu Payyan 3 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Sia ? 3 years, 5 months ago

The energy released by fusion is three to four times greater than the energy released by fission, giving the "hydrogen" bomb, or H-bomb, more power. The name comes from the fact that it uses a fusion of tritium and deuterium, hydrogen isotopes.

ANSWER

Room temperature in kelvin scale

Posted by Krishna Chander 3 years, 11 months ago

Entrance Exam > NEET-UG > Chemistry

3 answers

Harshada Mehetre 3 years, 8 months ago

298K

Ziya Rehaman 3 years, 10 months ago

(K-273)/100=C/100=(F-32)/180 So, (K-273)/100=25/100=(F-32)/180 => K= 298 => F= 77

Gaurav Seth 3 years, 11 months ago

The normal room temperature which would be comfortable for living is around 20 - 25° C.

In chemistry, The upper limit 25°C is taken as Standard room temperature .

We know that,
Temperature on Celsius + 273 = Temperature on Kelvin.

Now,
25°C = 25 + 273 = 298K .

Therefore, The standard room temperature in Kelvin is 298 k

ANSWER

Mendeele recorganised the signifinace of

Posted by Ahsu Ahsu 4 years ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Saksham Hi Ij Arora Ji O 4 years ago

Man 7 soul mon2 9

ANSWER

What are the total number of groups in a periodic table

Posted by Sufy Sufy 4 years, 3 months ago

Entrance Exam > NEET-UG > Chemistry

5 answers

Aastha Gupta 4 years, 3 months ago

Pankaj Patil 4 years, 3 months ago

18 group

Avneesh Kumar 4 years, 3 months ago

18 groups

Dhanshri Bedre 4 years, 3 months ago

18 group

Yogita Ingle 4 years, 3 months ago

In the periodic table, there are 7 periods and 18 groups.

ANSWER

Explain hypotonic and hypertonic sol

Posted by Fara Khan 4 years, 3 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Gaurav Seth 4 years, 3 months ago

Isotonic Solution:

If the medium surrounding the cell is of exactly the same water concentration as inside the cell, there will be no net movement of water across membrane resulting in no change in size of cell. Such solution is called Isotonic solution.

(iii) Hypertonic solution:

If the medium surrounding the cell has a lower water concentration than inside the cell, i.e., if the solution is highly concentrated, then the cell will lose water through osmosis. Such concentrated solution is called Hypertonic solution.

ANSWER

An element has two isotopes with mass numbers Z+2 and Z-1. If the atomic mass of the element be Z, then the abundance of the lighter isotope ??

Posted by Agomoni Mukherjee 4 years, 4 months ago

Entrance Exam > NEET-UG > Chemistry

2 answers

Prince Yadav 4 years, 2 months ago

Answer here's

Avneesh Kumar 4 years, 3 months ago

Yes

ANSWER

Hypothetical reaction X give rise to do Why preceded by the following sequence of steps first step is half X give rise to Z delta H is equals to Q1 second step is said that give rise to 2w delta H is equals to Kyoto third step SW give rise to half of my that is delta H is equals to Q3 the value of delta H of reaction is

Posted by Sapna Kumari 4 years, 4 months ago

Entrance Exam > NEET-UG > Chemistry

0 answers

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The standard Gibbs energy changes from a gaseous reaction at 27 degree celsius is X KCL is equilibrium constant for a reaction is hundred and R is to calorie per Kelvin for more then X is

Posted by Sapna Kumari 4 years, 4 months ago

Entrance Exam > NEET-UG > Chemistry

0 answers

ANSWER

Calculate the molar mass of the following h2o

Posted by Ankit Raj 4 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

5 answers

Himanshu Kumar 4 years ago

Piya Rani 4 years, 3 months ago

Avneesh Kumar 4 years, 3 months ago

Bhawana Pradhan 4 years, 5 months ago

Taniya Khatarkar 4 years, 5 months ago

ANSWER

Bengoic acid is heated what will happen

Posted by Manojit Das 4 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Sanju Gm 4 years, 3 months ago

When benzoic acid is heated in presence of a strong dehydrating agent like P2O5 or H2SO4, it forms benzoic anhydride

ANSWER

What is the weightage of organic chemistry? Is it ok if i just leave this organic part in chem

Posted by Sandhiya Sharma 4 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Nishant Sharma 3 years, 5 months ago

No no never! Organic has major part in chemistry! You may get a decent score near 100-120 but if you want more than that organic will help you!

ANSWER

What is ARGYROL? And its use?

Posted by Parag Ingole 4 years, 5 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Yogita Ingle 4 years, 5 months ago

Argyrol is a silver sol and is used as an eye lotion. It is manufactured in the chemical industry to pharmaceutical-grade only, using denatured pharmaceutical-grade protein for ophthalmic application and elemental silver, to produce the silver protein molecule.
Also, colloidal antimony (kajal) has been found effective in treating eye diseases.

ANSWER

Chemical formula of washing soda

Posted by Leela Devi Leela Devi 4 years, 6 months ago

Entrance Exam > NEET-UG > Chemistry

4 answers

Bonito Assumi 3 years, 10 months ago

Na2CO3.10H2O

Vansh Mishra 4 years, 5 months ago

Na2CO³.10H2O

Nithisha Mondi 4 years, 6 months ago

Na2co3.10H2o

Leela Devi Leela Devi 4 years, 6 months ago

Answer

7Thank You

ANSWER

How to open Chemistry notes in this app

Posted by Chetan Machkure 4 years, 7 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Geeta Jadhav 1 year, 7 months ago

Same question I want to ask you

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What will be the molar conductance ^ if resistivity is x for 0.1N \mathrm{H}_{2} \mathrm{SO}_{4} solution ?

Posted by Taj Rahaman 4 years, 7 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Aswimsivam Aswinsivam 4 years, 7 months ago

Obtion

ANSWER

Polymers chapter

Posted by Reena Attri 4 years, 7 months ago

Entrance Exam > NEET-UG > Chemistry

0 answers

ANSWER

Describe the relation between li and mg with the help of two illustrative properties

Posted by Bhupesh Walde 4 years, 8 months ago

Entrance Exam > NEET-UG > Chemistry

2 answers

Varun Jakhar 1 year, 3 months ago

Diagonal relationship

Gunjan Girdhar 4 years, 7 months ago

Diagonal relationship

ANSWER

How to learn organic names of the organic compounds

Posted by Mohamed Abdullah 4 years, 9 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Sachin Sumanth 4 years, 9 months ago

Names are not that much necessary.only the name reactions and conversions are important.so practice and memorise them.if you want to memorise names then follow pneumatics and learn

ANSWER

What is science

Posted by Rupalikumari Rupalikumari 4 years, 9 months ago

Entrance Exam > NEET-UG > Chemistry

2 answers

Himanshu Kumar 4 years ago

Science is study of environment which contains physical, chemical and biological composition --mainly four branch of science --physics, chemistry, biology and geology.

Sachin Sumanth 4 years, 9 months ago

Science is the study of physical,chemical and biological composition and aspects of all ecosystems and life forms from the birth of this universe

3Thank You

ANSWER

Detail Ambident nucleophiles

Posted by Sangeeta Sinha 4 years, 9 months ago

Entrance Exam > NEET-UG > Chemistry

1 answers

Gunjan Girdhar 4 years, 7 months ago

Connecting species from both sides or said to be ligand that attach from both the sides example CN the site is preaent from c as well as n...... From c they r kn as cyanide n from n they r cd isocyanide