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Molecular Mass
Acid-Base Reactions
Acids, Bases And Salts
Alloys
Animal Husbandry
Animal Tissues
Animals – Nervous System
Applications of Baking Soda
Are Plants and Animals Made of Same Types of Tissues?
Asexual Reproduction
Atmospheric Refraction
Atomic Number and Mass Number
Balanced and Unbalanced Forces
Biology
Brain Structure
Can Matter Change its State?
Carbon and Its Compound
Carbon and its Compounds
Chemical Effects of Electric Current
Chemical Equations
Chemical Formula
Chemical Properties Of Acids And Bases
Chemical Properties Of Carbon Compounds
Chemical Properties Of Metals
Chemical Reactions
Chemical Reactions and Equations
Chemical bonding and molecular structure
Chemistry in Everyday Life
Circulatory System
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Control and Coordination
Coordination In Plants
Corrosion
Current Electricity
Defects Of Vision And Their Correction
Digestion In Humans
Digestive system
Domestic Electric Circuits
Eco-System
Ecology
Ecology and Environment
Ecosystem
Effects Of Oxidation Reactions In Everyday Life
Electric Circuit
Electric Current And Circuit
Electric Potential And Potential Difference
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Electrolysis
Electromagnetism
Elements of Material Science
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Environmental Science
Excretion
Excretory system
Factors On Which The Resistance Of A Conductor Depends
Force On A Current-Carrying Conductor In A Magnetic Field
Free Fall
General Science
Genetics and Evolution
Graphical Representation of Motion
Gravitation
Heating Effect Of Electric Current
Heredity
Heredity and Evolution
How Do Metals And Non-Metals React?
How Do Organisms Reproduce
How Do Our Activities Affect The Environment?
How are Electrons Distributed in Different Orbits (Shells)?
Human Circulatory System
Human Development
Human Eye and The Colourful World
Human Reproduction
Human body
Human physiology
Hydrocarbons
Improvement in Crop Yields
Inertia and Mass
Isotopes
Laws of Chemical Combinations
Life Processes
Life Science
Light
Light - Reflection and Refraction
Magnetic Effects Of Electric Current
Magnetic Effects of Current and Magnetism
Magnetic Field And Field Lines
Magnetic Field Due To A Current-Carrying Conductor
Measuring the Rate of Motion
Metallurgy
Metals and Non-Metals
Microorganisms
Modes Of Reproduction Used By Single Organisms
Natural Resources
Nervous system
Newton’s First Law Of Motion
Newton’s Second Law Of Motion
Newton’s Third Law Of Motion
Occurrence Of Metals
Ohm’s Law
Optics
Organic Chemistry
Organic Chemistry
Our Environment
Oxides
Ozone Depletion
Periodic Classification of Elements
Photosynthesis — Food Making Process In Plants
Physical Nature of Matter
Physical and Chemical Changes
Physics
Plant Biology
Plant Nutrition
Plant Physiology
Plant Tissues
Production of Sound
Propagation of Sound
Range of Hearing
Rate of Change of Velocity
Ray optics and optical instruments
Redox reactions
Reflection of Sound
Refraction
Refraction of Light
Reproduction
Reproduction in Organisms
Reproduction in Plants
Resistance Of A System Of Resistors
Respiration
Scattering Of Light
Sexual Reproduction
Soaps And Detergents
Solid Waste Management
Some basic concepts of chemistry
Spherical Mirrors
Structure of atom
The Human Eye
The Structure of an Atom
The respiratory system
Thermodynamics terms
Transport in Plants
Types Of Chemical Reactions
Ultrasound and its application
Valency
Weight
What are the Types of Pure Substances?
What is a Cell Made Up of? What is the Structural Organisation of a Cell?
What is a Mixture?
What is a Molecule?
What is a Solution?
Work
functional groups
human nervous system
human reproduction

List of top Science Questions on Molecular Mass

Calculate the molar mass of the following substances.
(a) Ethyne, \(C_2H_2\)
(b) Sulphur molecule, \(S_8\)
(c) Phosphorus molecule, \(P_4\) (Atomic mass of phosphorus= 31)
(d) Hydrochloric acid, \(HCl\)
(e) Nitric acid, \(NO_3\)

CBSE Class IX
Science
Molecular Mass

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