chem chapter 1

A tested explanation of the results of many experiments.

A homogeneous mixture in which all particles are of the size of atoms, small molecules, or small ions.

A homogeneous region within a sample.

Any matter consisting of two or more substances physically combined in no particular proportion by mass.

0.001 m. 1000 mm

0.001 L. 1000 mL = 1 L.

1 dm³. 1 L = 1000 mL = 1000 cm³

A description of behavior (and not an explanation of behavior) based on the results of many experiments.

A property whose physical magnitude is independent of the size of the sample, such as density or temperature.

A mixture that has only one phase and that has uniform properties throughout; a solution.

A mixture that has two or more phases with different properties.

0.001 kg.

A property of an object that is described by a physical quantity whose magnitude is proportional to the size or amount of the object (e.g., mass or volume).

The ratio of an object's mass to its volume. (mass/volume)

0.000000000001

10^-12

0.000000001

10^-9

0.000001

10^-6

10^-3

0.01

10^-2

0.1

10^-1

1,000

10³

1,000,000

10⁶

3600 seconds

2.54 cm

39.37 inches

0.9144 m

1.609 km

0.6215 mi

453.6 g

2.205 lb

28.35 g

3.785 L

1.057 qt

946.4 mL

29.6 mL

(9/5)temp in celsius + 32

(5/9)temp in fahrenheit - 32

celsius temp+273.15

Zeros to the right of a decimal point are always counted as significant.

Zeros to the left of the first nonzero digit are never counted as significant.

Zeros on the end of a number without a decimal point are assumed not to be significant.

or multiplication and division, the number of significant figures in the answer should not be greater than the number of significant figures in the least precise measurement.

For addition and subtraction, the answer should have the same number of decimal places as the quantity with the fewest number of decimal places