MEDIUM
9th CBSE
IMPORTANT
Earn 100

Define formula unit mass of a compound. Calculate the formula unit mass of  Na2CO3.10H2O  compound.

[ Atomic mass of  Na = 23, C = 12, O = 16]

 

Important Questions on Practice Paper 1

MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 16 - Practice Paper 1>1; PRACTICE PAPER>Q 31

Calculate the formula unit mass of CuSO4.

[Atomic mass of Cu = 63.5, S = 32, O = 16 ]

EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 16 - Practice Paper 1>1; PRACTICE PAPER>Q 31
What is meant by unified mass.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 16 - Practice Paper 1>1; PRACTICE PAPER>Q 31
Define atomic mass unit.
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 16 - Practice Paper 1>1; PRACTICE PAPER>Q 31
Distinguish between molecular mass and molar mass.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 16 - Practice Paper 1>1; PRACTICE PAPER>Q 31
Give an example of diatomic molecule of compounds.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 16 - Practice Paper 1>1; PRACTICE PAPER>Q 31
Give an example of triatomic molecule of compounds.
HARD
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 16 - Practice Paper 1>1; PRACTICE PAPER>Q 31
Calculate the number of oxygen atoms in 0.10 mole of Na2CO3.10H2O.
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 16 - Practice Paper 1>1; PRACTICE PAPER>Q 32
From the symbol Ar1840, write down the number of neutrons in the nucleus of an atom. Also find the number of electrons, protons and its valency.