Experiment 1: Density Flashcards Preview

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Flashcards in Experiment 1: Density Deck (15)
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1
Q

Density=

A

mass/volume

2
Q

Density is a _____ property.

A

Intensive (independent of the amount of substance and is constant for all pure samples.

3
Q

High density implies_______ on the molecular level

A

Tighter packing which implies stronger molecular interactions.

4
Q

Water is most dense at what temperature?

A

4 C

5
Q

Specific gravity is?

A

The ratio of the density of a substance to that of water. It is temperature dependent. No units for specific gravity.

6
Q

Density Calculations

A

Find mass of object. Find volume. Easy stuff.

7
Q

Density of a block of wood, metal cylinder, etc.?

A

1) Measure with ruler.
2) Weigh with balance
3) Divide.

8
Q

Density of a rock?

A

1) Take mass in air.
2) Mass submerged in water
3) Difference = mass water displaced
4) Mass water=Vol. Water=volume rock

9
Q

Density of PVC?

A

1) Take mass of empty graduated cylinder.
2) Make a CaCl2 solution that allows levitation
3) Take mass of full cylinder
4) Read volume of solution

10
Q

If the PVC floats?

A

The solution is too dense

11
Q

If the PVC sinks?

A

The solution is not dense enough

12
Q

What are intensive properties, name 3 examples?

A

A property independent of the amount of substance, constant for pure samples. Examples: Time, melting point, boiling point

13
Q

What are extensive properties?

A

Property of a substance dependent on how much of it there is. Examples: Mass, volume, length

14
Q

How to calculate the mass of displaced water?

A

(Mass rock in air) - (Mass rock in water) = mass of water displaced. (kg)

15
Q

Mass of water displaced also equals….

A

the volume of water displaced (L)