Chem Test 1

Give an example of physical change

ice melting (boiling point, melting point), tearing paper

Give an example of chemical change

Baking soda in vinegar, rusting, paper burning

What is the term for a tentative explanation dealing with facts and a possible prediction of the future

hypothesis

T/F A theory can be proven to be absolutely true

False, would be a law

Two types of pure substances

elements and compounds

if bubbles were seen on an eggshell after vinegar was poured on it, what type of change is that

chemical

If antimony is a solid at 15 degrees C, and it changes to a liquid at 110 degrees C, then what kind of property would that be

physical

Give an example of an intensive property

color, electrical conductivity

Give an example of an extensive property

mass, volume

T/F a kilo is a decimal multiplier in the metric system

true

what are the SI base units of temperature and mass

temperature- kelvin, mass- kilogram

What is the derived SI unit for force

kg x m/s^2

Celcius to Kelvin

K = C + 273.15

Kelvin to Celcius

C = K - 273.15

Celsius to Fahrenheit

F = 9/5 (C) + 32

Fahrenheit to Celsius

C = 5/9(F-32)

If you have 80.7, how many sig figs

3