menu search
brightness_auto
more_vert
4) solve problems

D. Calculate the number of atom in each of the following (Given : Atomic mass of I = 127 u).

a. 254 u of iodine (I)

b. 254 g of iodine (I)
thumb_up_off_alt 0 like thumb_down_off_alt 0 dislike

1 Answer

more_vert
 
verified
Best answer

Given : atomic mass of I=127 u 

A. 254 u of iodine (I) 

Formula : number of atoms = \(given \space atomic \space mass \space of \space element\over atomic \space mass \space of \space element\) 

\(\therefore \space ={254\over 127}\) 

=2 atoms 

254 u of iodine (I) consist of  2 atoms of I 

B. 254 g of iodine (I)

we know the Molar mass of iodine  which is 127 g 

Formula :: no of moles =\(given\space mass\over molar \space mass\) 

\(\therefore\space = {254\over 127 }=2\) moles 

therefore , number of atoms = n× Avogadro's number 

=2\(\times 6.022\times 10^{23}\) atoms =\(1.2044\times 10^{24} atoms\)

254 g of iodine (I) consist of  \(1.2044\times 10^{24} atoms\)

thumb_up_off_alt 0 like thumb_down_off_alt 0 dislike

Related questions

thumb_up_off_alt 0 like thumb_down_off_alt 0 dislike
1 answer
thumb_up_off_alt 1 like thumb_down_off_alt 0 dislike
1 answer
thumb_up_off_alt 1 like thumb_down_off_alt 0 dislike
1 answer
thumb_up_off_alt 0 like thumb_down_off_alt 0 dislike
1 answer

Welcome to Brainiak.in , where you can ask questions and receive answers from other members of the community ,

There is many categories for every students  CBSE , Maharashtra board , JEE , NEET  and we will add more categories

and make brainiak one of the most loved community of students

Advertisement

Get Your advertisement on Brainiak.in Buy Adspace

3.0k questions

2.5k answers

24 comments

340 users

...