Exam 1 Flashcards
(32 cards)
What is a chemical?
Substances that have the same composition and properties wherever found
Why are sig figs important?
They show the precision of a measurement
What does 1mL equal too?
1cm^3
What is the density ratio?
D=m/v
What is energy?
Makes objects move and stop the ability to do work
What is kinetic energy?
Energy in motion
What is potential energy?
Energy stored for use at a later time
What is thermal energy?
Energy associated with the movement of particles
Water boiling and freezing points?
Boiling:100C
Freezing: 0C
What is absolute zero?
Lowest possible temp
What is matter?
The material that makes up all things anything that has mass and occupies space
What is a pure substance?
Has a fixed composition
What is a mixture?
Contain two or more pure substances physically not chemically
What is an element?
One type of atom
What is specific heat?
Amount of heat that raises the temperature of 1g of a substance by 1C
What is specific heat formula?
SH=heat/grams*^t
Carbohydrates energy value?
4
Fat energy value?
9
Protein energy value?
4
What is atomic number?
Whole number on periodic table amount of protons in an atom
What is the mass number?
Protons+neutrons number on top on periodic table amount
1km
1000m
1m
1000mm
1m
100cm
