Unit 01: Matter (Significant Figures (Rules for Sig Figs (Non Zeros- are…
Unit 01: Matter
Rules for Sig Figs
Non Zeros- are always significant (1875 =4 S.F.)
Leading Zeros are never significant (1200 = 2 S.F.)
Captive Zeros are always significant (2003 = 4 S.F.)
Trailing Zeros are sometimes significant (100.0 = 4 S.F.)
Converting Decimal Form to Scientific Notation
1,000,000 = 1 x 10^6
.0000001 = 1 x 10^-6
Changes of matter
a chemical reaction involving the rearrangement of atoms. While a physical change can often be reversed, a chemically change typically cannot be, except through more chemical reactions.
Mixing acid and base.
a type of change in which the form of matter is altered but one substance is not transformed into another.
Crushing a can.
Melting an ice cube.
Classification of matter
a part or aspect of something abstract, especially one that is essential or characteristic.
Hydrogen, Carbon, Nitrogen, Sodium, Potassium, Aluminium, Sulphur, Oxygen,
water, carbon dioxide, and table salt.
a thing that is composed of two or more separate elements; a mixture.
simply any mixture that is not uniform in composition - it's a non-uniform mixture of smaller constituent parts.
Sugar and sand form a heterogeneous mixture. ...
Ice cubes in cola form a heterogeneous mixture. ...
Salt and pepper form a heterogeneous mixture.
a solution that has equal proportions of its components throughout any given sample.
Properties of Matter
any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.
Reactivity with other chemicals.
Enthalpy of formation.
any property that is measurable, whose value describes a state of a physical system.