CHAPTER 3: CHEMICAL REACTIONS AND REACTION STOICHIOMETRY

Chemists

Chemists

________ construct unbalanced equations to identify reactants and products.

mole concept

The ________ allows us to convert this information to the masses of the substances in the reaction.

chemical equation

The coefficients in a(n) ________ represent the relative numbers of molecules in a reaction.

laboratory size

In chemistry the counting unit for numbers of atoms, ions, or molecules in a(n) ________ sample is the mole, abbreviated mol.

chemical formulas

The ________ to the left of the arrow represent the starting substances, called reactants.

Stoichiometry

________ (Greek stoicheion,"element, "and metron, "measure) "provides an essential set of tools widely used in chemistry.

Amole

________ is always the same number, but 1- mol samples of different substances have different masses.

empirical formula

The ________ for a substance tells us the relative number of atoms of each element in the substance.

Combustion

________ of oxygen- containing derivatives of hydrocarbons, such as CH3OH, also produces CO2 and H2O.

Avogadros number

________, NA, in honor of the Italian scientist Amedeo Avogadro (1776- 1856), and it is often cited with units of reciprocal moles, 6.02* 1023 mol- 1.

Stoichiometry

________ is built on an understanding of atomic masses, chemical formulas, and the law of conservation of mass.

chemical formulas

The ________ to the right of the arrow represent substances produced in the reaction, called products.

Avogadros number

The molar mass and ________ are used as conversion factors to convert grams to moles and then moles to atoms.

combination reactions, decomposition reactions, and combustion reactions

Three types of reactions