chemistery Flashcards
(15 cards)
Physical changes
Appearance changes substance doesn’t
Chemical changes
Substance changes with new properties
Pure substance
All the particles that make up the substance are the same
Mixtures
Different substances are brought together without creating a new one
Different evidence of a chemical change
New colour produced, procedures, bubbles, new solid produced into liquids are mixed
Quality
Description
quantitative
Anything with numbers
why is water unique?
High surface tension, universal solve, high heat capacity
solid form is more dense then liquid
grass
given info
Required info
Analysis (formula)
Solution (solve)
statement(therefor)
finding volume
V=m/D
density
amount of mass per unit volume
solution
Homogeneous mixture
what is the difference between pure water and water from oh well
Pure water doesn’t have chemicals while wells come from an underground source
Why does changing the shape of an object have no effect on the density?
When you change the shape of an object, you are alternating its volume, but mass stays the same
What does an air bubble rise to the surface of a glass of water?
Density difference, the bubble rises through the water until it reaches the surface where the air in the bubble disappears
