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                                                          Science and tech review



10) C) The reaction creates new types of atoms.
11) C) Inhibitor
12) D) Soap scum forms.
13) C) Exothermic

17) B) steam Condenses
18) B) reduce the concentration of a reactant
19) B) speeds up the reaction
20) Pickled cucumbers would last longer because they are stored in salt or vinigar which is an inhibitor.
21) The beaker of water would have became warm from absorbing heat from the sun, no chemicle reaction has taken place.

24) If I was in a hurry I would choose ground meat rather then meat chunks, because the ground meat has more surface area then the meat chunks, so it would heat up faster then the meat chunks.

26) The steel wool would weigh more after it has reacted with oxygen  because the molar mass of iron is 55.85, and the molar mass of oxygen is 16.00 if you add them together you would get the molar mass of iron oxide which would weigh more then just iron.

page 90
7) D) vinegar
8) C) non-polar
9) A) polar
10) C) the solution
11) C) temperature
13) B) solute
14) C) a strong acid
15) C) less then &7
16)  D) it is neutralized

page 91
20) cresol red, thymol blue
21) H+ is acidic and OH is basic
22) Liquid-gas solutions: When a gas dissolves in a liquid. example)
      Liquid-solid solutions: Is when a soluble solid dissolves in a liquid.
      liquid liquid solutions: When a liquid dissolves in another liquid.
23)
24)When the pop is warm the carbon dioxide becomes less soluble, so it will fizz out faster.
      When the pop is cold the carbon dioxide becomes more soluble, it wont fizz as fast as it would if it was
      warm.
page 120
8) C) Hydroxyl
9)C) CH3OH
10)A) Cholesterol
11)B)Saturated Hydrocarbon
12)C)Difluoromethane
13)C)NH2CH2COOH
14)B)Amino acids
15)Lipids
16)C)Cyclopentane
page 121
17) Benzene has one hydrogen atom per carbon atom and all the carbon atoms have double bonds with each other.
cyclohexane has two hydrogen atoms per carbon atoms and the carbon atoms all have single bonds with each other.
21) If they eat lots of carbohydrates they will have more enetgy the next day.
25) this is the amino acid i found.