Lecture 6/30 Flashcards
1
Q
How many yds in one mi?
A
1760 yds
2
Q
Area =
A
L * W
3
Q
V =
A
L * W * H
4
Q
What are the 2 main branches of matter? (tier 1)
A
Chemical and physical means of separation
5
Q
Tier 2- chemical =
physical =
A
c = pure substances
p = mixtures
6
Q
Tier 3 - what are the 2 branches of pure substances?
A
- elements
- chemical compounds
7
Q
Tier 3 - What are the 3 branches of mixtures?
A
- solutions
- colloids (fog, smoke, milk)
- suspensions
8
Q
What are colloids/suspensions?
A
- heterogeneous
- different depending on where we sample them.
9
Q
What are elements?
A
basic building blocks of all chemical substances
10
Q
How many known elements exist?
A
118
