Compounds and whatever

Question 1

Law of definite proportiond

Answer 1

Two compounds are the same if they have:

• Identical (w/sf) percent composition
• Identical (w/sf) mass ratio

Question 2

Law of mutiple porportions

Answer 2

If two compounds are different but contain the same elements, their mass ratio will be small, whole number ratios to each other
EX: 2 to 1, 3 to 2, 1 to 3

Question 3

Finding percent composition

Answer 3

Mass of element divided by the total mass multiplied by one hundred

Question 4

Avogadros law

Answer 4

The volume of the gas is dependent on the number of particles rather than the mass. He concluded that equal volumes of gas under the same temperature and pressure contain equal number of particles

Question 5

Mixture

Answer 5

A physical combination of two or more substances where each keeps its unique physical properties

Question 6

Hetergeneous

Answer 6

Mixture on a large particles level where differences can be seen between components

Question 7

Homogenous

Answer 7

Mixture on a small particle level where differences cannot be seen between component

Question 8

Pure substance

Answer 8

A substance where every particle is identical

Question 9

Compound

Answer 9

Particles composed of more than one type of atom bonded together

Question 10

Element

Answer 10

Particles composed of the same type of atom throughout

Question 11

Molecule

Answer 11

Particle composed of more than one atom bonded together

Question 12

Atom

Answer 12

Particle that cannot be broken down any further

Question 13

Particle pictures

Answer 13

Draw particles showing differences
Bonded atoms touching
Color or design differences for different particles

Question 14

Dif between compound and element

Answer 14

Compound has to have more than one type of atom bonded together. AN element only has one type of element and may or may not contain chemical bondsq

Question 15

Dif between mixture and pure substance

Answer 15

Mixture: dif particles have dif identities and retain their own chem and physical properties
Pure substance: Every particle is identical with the same physical and chemical properties

Question 16

Describe the two dif types of mixtures

Answer 16

Heterogenous- have particles large enough to be seen and you can see the dif between components
Homogenous- Mixed on an extremely small particle level where the mixture appears the same throughout

Question 17

How to separate mixtures

Answer 17

• Magnetic (magnetic components to nonmagnetic)
• Filtration- (Solid from liquid by passing it through filter paper)
• Evaporation (liquid is boiled away leaving previously dissolved solids behind)

Question 18

How to separate compounds

Answer 18

Chemical compounds require chemical means to separate them

• Electrolysis (using electricity to separate a compound such as water going to hydrogen and oxygen)
• Thermal decomposition (using heat to break chemical bonds to separate compounds)

Question 19

Mixture vs compound

Answer 19

In the mixture the two dif substances are occupying the same space and surrounding each other. They are close but not bonded. In the compound they are bonded and forma solid with a repeating pattern