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

Let Ag107 and Ag109 available in x% and y% respectively. So,x + y = 100 .........(i) Now, (x × 107/100)+(y × 109/100) =108.5 1.07x +1.09y=108.5 ..........(ii) On multiplying (i) by 1.09 and subtracting (ii) from (i),we get 0.02x = 0.5 ==> x = 25 On putting x = 25 in (i), we get y = 75 Percent of Ag107 =25% Percent of Ag109 =75%

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Mohamed Amaam 6 years, 7 months ago

Hmmm wo tho hai hi

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Seetu Chauhan 6 years, 7 months ago

Chemistry is too boring subj...

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ANSWER

Calculated the molar mass of CH4

Posted by Rahul Kumar 6 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

Ranjeet Kumar 6 years, 7 months ago

Mass number of Carbon (C) = 12.044u Mass number of Hydrogen (H) = 1.008u Thus,mass number of CH4 = (12.044 + 4 ×1.008) = 16.076u Molar mass of CH4 is the mass number of CH4 expressed in grams i.e.16.076 grams or 16 g.

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Dhama ...? 6 years, 7 months ago

16g/mole

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Rahul Kumar 6 years, 7 months ago

Calculate the molar mass of CH4

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What is chemistry?

Posted by Rahul Kumar 6 years, 7 months ago

CBSE > Class 11 > Chemistry

4 answers

Satyam Krishna 6 years, 7 months ago

Chemistry is the branch of science which deals with the study of matter including its properties composition as well as reactivity is called chemistry.

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Japisher Singh 6 years, 7 months ago

Study of composition ,properties and structure of matter and change that it undergoes under diff conditions and laws that govern these changes

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Yash Goswami????? 6 years, 7 months ago

Chemistry is a branch of science which deals with the study of matter

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Jas Reet? 6 years, 7 months ago

Chemistry is science of atom molecules and their transformation

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Ques. Arise.....what is the lowest value of n that allows g orbital to exist....give me ans. fast...plzz ...its urgent....

Posted by Dhama ...? 6 years, 7 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Is 1.9927 same as 2??

Posted by Preeti Rahi 6 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

@ Aashu 6 years, 7 months ago

Yup

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Riya Kausha 6 years, 7 months ago

Yeah

1Thank You

Aman ❤️?? 6 years, 7 months ago

Yes...but after rounding off

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What are the examples of 9 types of solution

Posted by Kunal Chunbuk 6 years, 7 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Why the does not make a wave when it hit with hockey

Posted by Harminderjit Singh 6 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Shruti Singh 6 years, 7 months ago

Couz mass is inversely proportional to wavelength of an object abd as its mass increases it's wave motion becomes negligible

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ANSWER

Calculate the mass per cent of different elements present in sodium sulphate.

Posted by Prachurjya Borbaruah 6 years, 7 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Which subject to select for percentage all or best 5

Posted by Mohit Singh 6 years, 7 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

Gyus how many of u r nervous about the 10th board results

Posted by Yash Goswami????? 6 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

Yash Goswami????? 6 years, 7 months ago

Ha bhai bas smart study kar raha 10th ki starting se matlab ki aap apni neend par kabu paa lo yani roz subha 3.30 se 4.00 k bich me utkhar panda chiye or bas jo cheej padoge wo yaad ho jayegi

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Japisher Singh 6 years, 7 months ago

Aap to 96.24 le gye bhai

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Rohit Sahani? 6 years, 7 months ago

Very very much

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When will result come of class 10?

Posted by Supriya Tiwari 6 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

Yash Goswami????? 6 years, 7 months ago

In 2nd week of may cbse announced officially

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Ship.. ??? 6 years, 7 months ago

Next week said Anurag Tripathi Secretary of CBSE

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Rohit Sahani? 6 years, 7 months ago

Not declared by CBSE

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How we can find electrons in NH4 (ammonium)??

Posted by Vanshika Sachdeva 6 years, 7 months ago

CBSE > Class 11 > Chemistry

0 answers

ANSWER

If mass is the amount of matter, then its SI unit should be in number but why is its unit KG?

Posted by Komal Shree 6 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Yash Goswami????? 6 years, 7 months ago

The mass is all about the area or weight (m×g) that any matter have covered so mass is calculated in kg

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If 20 ml of N2 reacts with 60 ml of H2 then how much ml it will give NH3.Answer this question with solution in detail stepwise.

Posted by Vivek Kumar 6 years, 7 months ago

CBSE > Class 11 > Chemistry

1 answers

Yash Goswami????? 6 years, 7 months ago

It will produce 40ml of NH3

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explain the electron gain enthalpy for some 3rd period atoms-P,S,Cl are more negative than 2nd period elements-N,O,F.

Posted by Manpreet Gill 6 years, 7 months ago

CBSE > Class 11 > Chemistry

3 answers

Pranav Gupta 6 years, 7 months ago

Energy is directly proportional to Z^2 / n^2. This ratio is greater in 3rd period atoms than 2nd period atoms.

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Shubhi . 6 years, 7 months ago

The elements of the second period have smalleat atomic size among the element in their respective group. As a result there are considerable electron - electron replusion within the atom itself and hence the additional electron is not a accepted with the same ease as is the case with the reamaing element

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Shubhi . 6 years, 7 months ago

Can u plz describe your question

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ANSWER

Hi...hlo...everyone...

Posted by Miss. Chocolover..??? 6 years, 7 months ago

CBSE > Class 11 > Chemistry