Limiting Reagent Basics
If 10 g of hydrogen reacts with 80 g of oxygen to form water, which reactant is limiting?
Law of Conservation
Why does the mass of reactants equal the mass of products in a chemical reaction?
Molar Volume
What volume will 1 mole of any gas occupy at STP?
Percent Composition
Calculate % of hydrogen in H₂O.
Common Mistake Alert
Students often confuse molar mass and molecular mass. Can you explain the difference?
Daily Life Connection
Where do we use the concept of moles in real life?
Dimensional Analysis
If speed of light = 3×10⁸ m/s, express it in km/hr.
Quick Concept Check
Why does Avogadro’s number have the same value for all substances?
Discovery of Electron
Who discovered the electron and how?
Rutherford’s Gold Foil
Why did most alpha particles pass through the gold foil in Rutherford’s experiment?
Bohr’s Model Basics
How does Bohr’s model explain atomic stability?
Quantum Numbers
What are the four quantum numbers and their significance?
Heisenberg’s Uncertainty
What does Heisenberg’s Uncertainty Principle state?
Hydrogen Spectrum
Why does hydrogen produce a line spectrum, not a continuous one?
Dual Nature
What does de Broglie’s hypothesis state?
Join Our Academic Community
Stuck on a problem? Connect with fellow students to get the answers you need or share your expertise to help others succeed.
100% Free for Students | Quick setup in 30 seconds