Mass and Moles in Chemistry
Explore the fundamental concepts of mass and moles in chemistry with this Grade 9 worksheet, covering atomic mass, molar mass, and mole calculations.
Includes
Standards
Topics
Mass and Moles: Fundamental Chemistry
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.
1. What is the approximate atomic mass of carbon?
1 amu
6 amu
12 amu
14 amu
2. Avogadro's number represents the number of particles in one of a substance.
gram
kilogram
mole
liter
3. The molar mass of a compound is the sum of the of all the atoms in its formula.
4. One mole of any substance contains approximately particles.
5. Calculate the molar mass of water (H₂O). (Atomic mass of H = 1.01 g/mol, O = 16.00 g/mol)
6. How many moles are present in 49.0 grams of sulfuric acid (H₂SO₄)? (Atomic mass of H = 1.01 g/mol, S = 32.07 g/mol, O = 16.00 g/mol)
7. The atomic mass unit (amu) is always equal to one gram.
True
False
8. The molar mass of an element is numerically equal to its atomic mass.
True
False
Match the term with its definition.
9. Mole
a. The mass of one mole of a substance
10. Molar Mass
b. 6.022 x 10²³ particles
11. Atomic Mass Unit
c. Unit used to express atomic and molecular masses
12. A sample of gas contains 3.01 x 10²³ molecules. If the gas is methane (CH₄), what is the mass of the sample in grams? (Atomic mass of C = 12.01 g/mol, H = 1.01 g/mol)
Related Worksheets
Single Replacement Reactions
Explore the principles of single replacement reactions in chemistry with this comprehensive worksheet for Grade 9 students.
History of Chemistry Timeline
Explore key discoveries and scientists that shaped the field of chemistry over time.
Hydrocarbons Worksheet
A Grade 9 science worksheet covering the basics of hydrocarbons, including their definition, types, and properties.
Nuclear Changes: Grade 9 Science
Explore the fundamentals of nuclear changes, including radioactivity, nuclear fission, and nuclear fusion, with this comprehensive Grade 9 science worksheet.
Molecular Compound Naming Worksheet
Practice naming molecular compounds using prefixes and suffixes.
Empirical and Molecular Formula Worksheet
Grade 9 Chemistry worksheet focusing on understanding and calculating empirical and molecular formulas.
VSEPR Theory Worksheet
Explore VSEPR theory with this worksheet, covering molecular geometries, electron domains, and bond angles for various molecules.
Acid Base Nomenclature Worksheet
A Grade 9 science worksheet on acid and base nomenclature, covering common acids, bases, and pH concepts.