Journal Entry:

What mass of hydrogen would be found in a fuel that when burned produced 23.5 grams of water?        Justify your solution with data and evidence.

Learning Intentions

• You will learn how to make conversion between number of particles, moles and mass of substances.

• You will learn how to calculate empirical and molecular formulas of a substance from mass, % composition or moles of the elements found in the substances.

• You will learn what combustion analysis is and how it can be used to determine empirical formula for a fuel.

• You will learn what Stoichiometry is and how it is used to determine unknown amounts from a chemical reaction.

Closing Task:

You can predict through calculation the mass of one substance from a chemical reaction from a known mass of another. 

Content Standards being covered:

The mole is the fundamental unit for counting numbers of particles on the macroscopic level and allows quantitative connections to be down between laboratory experiments, which occur at the macroscopic level, and chemical processes, which occur at the atomic level. (EK 1.A.3)

Conservation of atoms makes it possible to compute the masses of substances involved in physical and chemical processes. Chemical processes result in the formation of new substances, and the amount of these depends on the number and the types and masses of elements in the reactants, as well as the efficiency of the transformation (EK 1.E.2)