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問題一覧
1
What is the general term for 2 or more atoms bonded together?
molecule
2
What is a specific molecule that has two or more DIFFERENT kinds of atoms bonded together?
compound
3
What is an example of a compound?
C6H12O6
4
Molecules with only one type of atom (H2 or O2) are just called _______?
molecules
5
Most matter exists as ________: two or more components that are physically intermixed
mixtures
6
What are the three basic types of mixtures?
solutions, colloids, and suspensions
7
What is an example of a solution?
mineral water
8
What is an example of a colloid?
jello
9
What is an example of a suspension?
blood
10
Solute particles are very thin, do not settle out or scatter light
solution
11
Solute particles are larger than in a solution and scatter light; but also do not settle out
colloid
12
Solute particles are very large, settle out, and may scatter light
suspension
13
Solutions are ________ mixtures, meaning particles are evenly distributed throughout
homogenous
14
What is a substance present in greatest amount?
solvent
15
What is the substance dissolved in a solvent?
solute
16
What is an example of a solvent?
water
17
What is an example of a solute?
glucose
18
_____ solutions are usually transparent
true
19
Most solutions in body are true solutions of gasses, liquids, or solids dissolved in water
true
20
Unlike compounds, mixtures do not invoked chemical binding between components
true
21
Mixtures cannot be separated by physical means, such as straining or filtering, compounds can be separated only by breaking their chemical bonds
false
22
Mixtures can be both heterogenous or homogenous
true
23
Compounds are only homogenous
true
24
______ mixtures contain large, visible solutes that do settle out
heterogenous
25
Blood is considered a suspension because if left in a tube, the blood cells will settle out
true
26
What is an example of a suspension?
mixture of water and sand
27
What is another name for colloids?
emulsions
28
Colloids are heterogenous mixtures, meaning that particles are _____ and evenly distributed throughout mixture
not
29
Some colloids undergo sol-gel transformations
true
30
Cytosol or cell is also a sol-gel type solution
true
31
_______ is the number of moles of solute per liter of solvent (water)
molarity
32
1 mole of any substance ALWAYS contains 6.02 X 10^23 molecules of that substance
true
33
6.02 x 10^23 is also called what
avogadro’s number
34
1000 mM is equal to
1 M
35
1 mole of a compound is equal to its _______ ______ (sun of atomic weights) in grams
molecular weight