Unit 2 Matter Flashcards
1
Q
- Which of the following is not a physical property?
A
Reactivity with oxygen; U2C2
2
Q
- The color of ink is….
A
Physical property; U2C2
3
Q
- Three examples of physical changes are…
A
Boiling of water, blowing up a balloon, and melting a candle. U2C2
4
Q
- Increasing the surface area of a solid…
A
Increases the speed of dissolving; U2C3
5
Q
- A solution that contains all of the solute it can normally hold at a given temp is…
A
Saturated; U2C3
6
Q
- The particles in a liquid are usually…
A
Closer together and lower energy than a gas; U2C3
7
Q
- Using the data table to the right determine the identity of a cube of metal that measures 1.2cm on each side and has a mass of 18.15grams.
A
Silver; U2C2
8
Q
- A solution that contains more of the solute than it can normally hold at a given temp is…
A
Supersaturated; U2C3
9
Q
36.fragrance of a flower
A
Physical property; U2C2
10
Q
- Burning pocorn and making water
A
Chemical change; U2C2
11
Q
- Flammability of a substance
A
Chemical property; U2C2
12
Q
- Inflating a tire
A
Physical change; U2C2
13
Q
- Boiling water
A
Physical change; U2C2
14
Q
- How many grams of NaCIO3 are needed to make a saturated solution in 100g of water at 90°c?
A
180g; U2C2
15
Q
- In terms of saturation, how would you classify a KBr solution with a concentration of 90g in 100g of water at 10°C?
A
Supersaturated; U2C3
16
Q
- In terms of saturation, how would you classify a KNO3 solution of 30g in 100g of water at 40°C?
A
Unsaturated; U2C3
17
Q
- The solubility of Which salt is the least affected by tempature?
A
NaCl; U2C3
18
Q
- Bose-Einstein condensates are used to simulate conditions in a …
A
Black hole; U2C4
19
Q
- Iron and oxygen react to form rust. What will happen to the mass of the rust compared to the mass of the iron and oxygen before the reaction? Explain why this with occur.
A
Same bc law of conservation of mass says matter cannot be created or destroyed, even in a chemical change. U2C2
20
Q
- List and explain the three factors that increase the solubility dissolving rate of a substance.
A
- Solute size- rate bc move surface area
- Temp- rate bc more ke particles collide more
- Stirring- rate bc it brings fresh solvent in contact w solute; U2C4
21
Q
- A piece of wood that measures 3 cm by 6 cm by 4 cm has a mass of 80g. What is the density of the wood? If the density of water is 1g/mL, would the wood float in water?
A
V= 3 x 6 x 4= 72cm3 M= 80g D= ? D= m/v D= 80/72 D= 1.11g/mL U2C4
22
Q
- Find the mass of a 50mL volume of water if the density of water is 1g/mL.
A
M= ? V= 50mL D= 1g/mL D= m/v(v)
M= vd
M= (50)(1)
M= 50g
U2C4
23
Q
- A graduated cylinder has 33.5 mL of water. A piece of metal is added to the water and the new volume is now 46.2 mL. If the metal has a mass of 16.25g, what is its density?
A
V= 46.2-33.5 = 12.7mL M= 16.25g D= ? D= m/v
D= 16.25/12.7
D= 1.28g/mL
U2C4
24
Q
- Name one similarity between compounds and homogeneous mixtures and one difference.
A
Similarity- both involve >| elements.
Difference- compound is chemically combined + mixture is physically.U2C3
