Chemistry Chapter 1

Pure Substance

One type of matter

definite composition

distinct properties

Ex: Elements. Compounds

Law of Definite Proportions

Specifc compounds must always have same proportion of its elements by mass. Discovered by Proust

Mixtures

More thabn one type of matter

more tha one substance (Physcially Combined)

Variable Composition

Homogeneous Mixturres

Same Composition

Solution

Heterogeneous Mixtures

Not Constant Composition

Parts can separate

Intensive Property

Independent of the amount of sample

density

molar mass

Extensive Property

Depends on the size of sample

mass

10^6 (M)

Mega

10³ (k)

Kilo

10^-1 (d)

deci

10^-2 c

centi

10^-3 (m)

milli

10^-6 mew

micro

10^-9 (n)

nano