Question

the classroom consists of 10 equidistant bench is nitrous oxide is released from first desk and tear gas is released from last desk find out the desk from first at which stud students starts laughing and weeping simultaneously

Answer 1

here is ur answer dear

Answer 2

Let us assume :

1 row = 1 m

10 equidistance row = 9 m

Given :

Distance from N2O

D1 = x

Distance from weeping gas

D2 = 9-x

So now ,

Molecular weight (M1) of N2O = 44 gm/mol.

Molecular weight (M2) of C6H11OBr (Tear gas) = 179 gm/mol.

Now,

(D1/D2) = √{ (M2/M1) }

=> ( x/9 - x) =√{ (179/44) }

=> (x/9 - x) = √4

=> x/9 - x = 2

=> x = 18 - 2x

=> x + 2x = 18

=> 3x = 18

=> x = 6

Therefore ,

To cover 6 metre, the row will be 7 from where where students will start weeping and laughing simultaneously.

#Be Brainly !