What is matter
Anything that has volume and mass
What is precision
how close a series of measurements are to one another
what are atoms?
building blocks of matter
Why can intensive properties be used to identify a substance
they do not change based on amount
What are two different units that volume is measured in
cm and mL
What are mixtures
Consists 2 or more diffrent elements can be physically seperats from each other
what is avogadros number
6.02x10 23
where is the proton found
In the nucleus
Why cannot extensive properties be used to identify a substance?
they do change based on amount so it tells you almost nothing about composition without further study
why does increasing the surface are of a solute increase the rate of dissolving
it increases the chance of collision to happen
Who discovered the noble gases
William ramsay
What is preassure measured in
atmosphered or atm
What is evidence a chemical change occurred
Color change Bubbles temperature change precipitate
Describe the change that occurs between points B ---> C
the constant and potential energy increases
Lithium is a metal that is shiny and malleable is this description physical or chemical properties
Physical
what element group is very reactable with water
alkali metals
what does density tell us?
how tightly packed the particles in the substance are
List three intensive properties
Color density reactivity state of matter ect
water has a density of 1 what should be the unit?
g/mL
One of the methods of separating a mixture is distillation what seperates liquids in distillation
Boiling point
this group of nonmetal is unreactive
Noble gasses
what is Kinetic energy
due to motion of particles
list three extensive properties
Mass volume length
A sample of calcium has a mass of 80g how many moles are present
2 moles ca
When a small volum of water is boiled a large volume of steam is produced why?
the molecules are further apart for the steam