MEDIUM
9th CBSE
IMPORTANT
Earn 100

State the relation between empirical formula and molecular formula.

Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 22
Which postulate of Dalton's atomic theory is the result of the law of conservation of mass?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 23
Which postulate of Dalton's atomic theory can explain the law of definite proportion?  
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 24
If one mole carbon atoms weighs 12 grams, what is the mass (in grams) of 1 atom of carbon?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 25
Find the ratio by mass of the elements present in the molecule of ammonia. Given that, atomic mass: N=14 u, H=1 u. 
 
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 26
Name a compound whose empirical formula is same as the molecular formula.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 27
State the law of multiple proportions.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 28
Calculate the formula unit mass of CaCl2.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 1
Define molecule.