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