Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

How to determine molecular mass?
Asked by Topperlearning User | 30 Mar, 2016, 10:21: AM
answered-by-expert Expert Answer

The molecular mass of a substance is the sum of all the atoms present in one molecule of the substance. It is therefore the relative mass of a molecule expressed in atomic mass unit (u).

Example:

Let us determine the molecular mass of water.

The molecular mass of water (H2O) is the sum of the masses of two hydrogen atoms and one oxygen atom.

Therefore, the molecular mass of water (H2O) = 2 × (Atomic mass of hydrogen) + 1 × (Atomic mass of oxygen).

We know that the atomic mass of hydrogen is 1 unit and that of oxygen is 16 units.

                                                                          = 2 × (1) + 1 × (16)

                                                                          = 2 + 16

                                                                          = 18 u

Therefore, the molecular mass of water is 18 u.

 

Answered by | 30 Mar, 2016, 12:21: PM
CBSE 9 - Chemistry
Asked by rajputanaji290 | 03 Oct, 2023, 09:30: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by shivalaxmi0205 | 08 Mar, 2023, 07:46: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by shivalaxmi0205 | 08 Mar, 2023, 07:43: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by jssjj | 19 Jan, 2023, 07:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by mohammedhaqqani.6b | 14 Jun, 2022, 02:51: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by gillsaabjashanpreetsingh3 | 16 Jan, 2022, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by prachisharma772007 | 16 Jan, 2022, 11:12: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Chemistry
Asked by rupasajwan363 | 04 Jan, 2022, 04:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×