This folder contains resources about the conservation of matter and stoichiometry. This unit is part of the Chemistry collection, an open source California digital textbook plus supplementary resources.


  • Science > Chemistry
  • Science > General

Education Levels:

  • Grade 9
  • Grade 10
  • Grade 11
  • Grade 12




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HS-PS1-2: Next Generation Science Standards

Construct and revise an explanation for the outcome of a simple chemical reaction based on the outermost electron states of atoms, trends in the periodic table, and knowledge of the patterns of chemical properties.

HS-PS1-7: Next Generation Science Standards

Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.

SCI.9-12.CH.3.a: Science

Students know how to describe chemical reactions by writing balanced equations.

SCI.9-12.CH.3.b: Science

Students know the quantity one mole is set by defining one mole of carbon 12 atoms to have a mass of exactly 12 grams.

SCI.9-12.CH.3.c: Science

Students know one mole equals 6.02 x 10 to the 23rd power particles (atoms or molecules).

SCI.9-12.CH.3.d: Science

Students know how to determine the molar mass of a molecule from its chemical formula and a table of atomic masses and how to convert the mass of a molecular substance to moles, number of particles, or volume of gas at standard temperature and pressure.

SCI.9-12.CH.3.e: Science

Students know how to calculate the masses of reactants and products in a chemical reaction from the mass of one of the reactants or products and the relevant atomic masses.

SCI.9-12.CH.3.f: Science

Students know how to calculate percent yield in a chemical reaction.

SCI.9-12.CH.3.g: Science

Students know how to identify reactions that involve oxidation and reduction and how to balance oxidation-reduction reactions.

SCI.10-12.2.G: Science

express and manipulate chemical quantities using scientific conventions and mathematical procedures, including dimensional analysis, scientific notation, and significant figures;

SCI.10-12.8.B: Science

use the mole concept to calculate the number of atoms, ions, or molecules in a sample of material;

SCI.10-12.8.C: Science

calculate percent composition and empirical and molecular formulas;

SCI.10-12.8.D: Science

use the law of conservation of mass to write and balance chemical equations; and

SCI.10-12.8.E: Science

perform stoichiometric calculations, including determination of mass relationships between reactants and products, calculation of limiting reagents, and percent yield.

SCI.10-12.11.B: Science

understand the law of conservation of energy and the processes of heat transfer;
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