Question

calculate the molecular mass of H2O if the atomic weight is h-1 , O-16​

Answer 1

Answer:

2 X 1 +16 X 1= 18 so mass of H20 is 18

Answer 2

ᴘᴀɴᴛʜᴇʀɪᴏ's ʀᴇsᴘᴏɴsᴇ:-

Given:-

• Unified mass of Hydrogen (H) = 1 u
• Unified mass of Oxygen (O) = 16 u

To Find: Molecular mass.

Here,

• No. of atoms of Hydrogen = 2
• No. of atoms of Oxygen = 1

∴ Mass becomes = (1 u × 2) + (16 u × 1)

= 2 u + 16 u

= 18 u

∴ Mass of Water = 18 u

[Molar mass = 18 g/mol.]