LIVE Course for free

Rated by 1 million+ students
Get app now
0 votes
954 views
in Chemistry by (26.4k points)
closed by

Calculate the molecular mass of the following in u :

i. H2

ii. C6H5Cl 

iii. H2SO4

1 Answer

+1 vote
by (23.6k points)
selected by
 
Best answer

i. Molecular mass of H2O = (2 × Average atomic mass of H) + (1 × Average atomic mass of O)

= (2 × 1.0u) + (1 × 16.0 u)

= 18 u

ii. Molecular mass of C6H5Cl = (6 × Average atomic mass of C) + (5 × Average atomic mass of H) + (1 × Average atomic mass of Cl) 

= (6 × 12.0 u) + (5 × 1.0 u) + (1 × 35.5 u) 

= 112.5 u

iii. Molecular mass of H2SO4 = (2 × Average atomic mass of H) + (1 × Average atomic mass of S) + (4 × Average atomic mass of O) 

= (2 × 1.0 u) + (1 × 32.0 u) + (1 × 16.0 u) 

= 98 u

∴ i. The molecular mass of H2O = 18 u

ii. The molecular mass of C6H5Cl = 112.5 u

iii. The molecular mass of H2SO4 = 98 u

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...