Class 9 · Science · 2 practice questions · Free
Builds toward NEET: chemical bonding and molecular structure, chemical and ionic equilibrium
The number of atoms present in one molecule of carbon dioxide (CO₂) is:
Class 9 · Chemical formulaeThe number of moles in 36 g of water (molar mass 18 g/mol) is:
Class 9 · Mole concept & molar mass