ICSE Class 9 Chemistry Basics of Chemistry
- why necessary to balance chemical reaction
- How to understand valency?
- describe an experiment which proves the law of conservation of mass
- a gas that is an oxidizing as well as a reducing agent
- How is manometer related to angstrom
- Calculate the percentage of nitrogen and oxygen in NH4NO3
- how to calculate the mass of an atom
- what is symbol
- A molecular formula represents an element
- formula and valence of aluminate