#9:
a.
b.
#10:
Colloid because there are no particles.
#13:
a. 2.11%
b. 0.009%
#14:
Oceans, glaciers, water vapor, rivers.
#15:
Water is a renewable resource, because the amount of it has stayed the same for billions of years, and there's tons of it.
#16:
The water cycles through Earth's hydrologic cycle.
#1:
To remove impurities to make it drinkable.
#2:
Screening, filtration, chlorination
#3:
Removing foreign objects and substances such as oil or water or sticks.
#4:
a. Because salt water is a colloid, therefor they could not separate the salt and the water.
b. Separating the salt from the water.
#5:
#6:
Although global warming has melted some ice caps and made the water level rise, the water level of the world overall has not changed because water cannot be created or destroyed.
#7:
Being thirsty by the ocean and not having fresh water with you.
#8:
Without one step, the whole hydrologic cycle would be thrown off.
#11:
Wut.
#12:
It neutralizes acidic water.
#13:
Fluoride reduces tooth decay.
#18:
Chlorinated water is just overall safer to drink than untreated water, because the chlorine kills bacteria.
#19:
Too much chlorine in the water could be bad, and there are less of the beneficial chemicals.
#1:
Large organic molecules found in living systems.
#2:
a. Coal, petroleum, natural gas, nuclear fission
b. Natural gas
c. Nuclear fission
#3:
Biomass, hydropower, coal.
#4:
Macromolecules like lipids, carbohydrates and proteins.
#5:
Petroleum is used for fuel, and in its raw form, to make all kinds of everyday objects like sports equipment and CDs.
#17:
a. Burning of fossil fuels, respiration.
b. Forests, ocean
c. Running would increase your amount of CO2
#18:
A carbon dioxide starts in the atmosphere and moves to the biosphere to be altered by a plant. Then, the plant decays into the ground and seeps into water below the surface of the Earth, ending up in the ocean.
#19:
6CO2 + 6H2O --> C6H12O6 + 6O2, C6H12O6 + 6O2 --> 6CO2 + 6H2O
#20:
a. Increase of H2O increases with CO2 as more respiration occurs
b. It would counteract the predicted behavior of global warming because the water vapor would cool the air, but still not Earth's temperature.
#10:
#11:
a. Pentane: C5H12 + 8O2 --> 5CO2 + 6H2O
b. Propane: C3H8 + 5O2 --> 3CO2 + 4H2O
c. Hexane: 2C6H14 + 19O2 --> 12CO2 + 14H20
#1:
a. Chemical bonds break by pulling apart.
b. It requires energy.
c. They both have to be separated.
d. The chemical bonds are like magnets, they "snap" together.
#4:
a. Yes, because when the fuels combust they release energy, making it an exothermic reaction.
b. Coals, oils, and natural gases.
#1:
The energy stored in petroleum hydrocarbons was originally captured by photosynthesis in plants. Since animals eat the plants, and both plants and animals die, layers of crude oil formed.
#2:
a. A coiled spring.
b. The spring unwinding.
#3:
Bonds break and form to create new compounds.
#4:
Butane, it has more bonds that can break.
#5:
a. Potential
b. Potential
c. Kinetic
d. Potential
e. Kinetic
#6:
The law of conservation of energy states that energy cannot be created or destroyed in a chemical reaction.
#7:
Chemical bonds being broken do not require energy, they release stored energy.
#8:
a. Exothermic
b. Endothermic
c. Exothermic
#9:
C22H46 + O2 --> CO2 + H2O
The amount of carbon atoms bonded in the reactants is far higher than the amount of carbon atoms bonded in the products, which means bonds were broken and energy was released.
#1:
Two atoms sharing valence electrons.
#3:
The electrons are the sock and the dogs are the atoms. When the atoms try to pull away, the electrons keep them stuck together.
#4:
Valence electrons.
#5:
If written in Lewis structure, the two dots could be confused as valence electrons.
#24:
Methane, pentane, hexane, octane
#25:
Branched has a lower boiling point. Branched has a higher density because it is so compact, and the intermolecular forces are weaker.
#26:
a. Short straight
b. Short branched
c. Short branched
#1:
a. Alphabetical.
b. No, it has no purpose.
#2:
a. Order the data table based on the boiling points.
b. Methane, ethane, propane, butane, pentane, hexane, heptane, octane, nonane, decane.
#3:
Methane, ethane, propane, butane.
#4:
It is at or below 22 degrees Celsius.
#5:
None of the substances' boiling points show up between the temperatures.
#6:
The intermolecular forces are strong compared to butane.
#6:
CH3-CH2-CH2-CH3, CH3, CH3-CH2-CH2-CH2-CH3
#7:
a. Heptane, nonane.
b.
CH3-CH2-CH2-CH2-CH2-CH3, CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3
#8:
a. CH3CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH2CH3
b. The condensed is better because it is shorter and easier to write.
#20:
Yes, only the shape has changed.
#21:
CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3
CH3 CH3 CH3
| | |
CH2 CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2
|
CH2
|
CH2
|
CH2 - CH2 - CH2 - CH2 - CH3
#22:
Propane (C3H8)
#17:
a. C9H2O
b. C10H22
c. C16H34
d. C18H38
#18:
a. nonane
b. decane
c. hexadecane
d. octodecane
#19:
a. Propane C3H8
b. Pentane C5H12
#20:
Yes, only their shape changed.
#21:
CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3CH3 CH3 CH3 | | |CH2 CH2 - CH2 - CH2 - CH2 - CH2 - CH2 - CH2 | CH2 |CH2 |CH2 - CH2 - CH2 - CH2 - CH3
#22:
Propane (C3H8)
#23:
Both representations are correct. The shapes in which the atoms are connected does not matter unless it changes the order or amount of atoms.
