Test Corrections Form A

Question 1

The color of ink is

U2C2-properties of matter
8

Answer 1

A physical property

Question 2

The substance being dissolved in a solution is
U2C4-Solutions
10

Answer 2

The solute

Question 3

Which of the following is not a physical property
Color odor state or reactivity with oxygen

U2C2-properties of matter
11

Answer 3

Reactivity with oxygen

Question 4

Matter in which particles are free to move in all directions they have spread evenly throughout their container

U2C2-properties of matter
12

Answer 4

Gas

Question 5

What is another name for a homogeneous is….
13
U2C2-solutions

Answer 5

A solution

Question 6

What effect does increasing surface area of a solid have on solubility

16
I couldn’t find in notes

Answer 6

Increasing the surface area of a solid increases the speed of dissolving

Question 7

Is the fragrance of a flower a chemical property physical property chemical change or physical change

36
U2C2- Properties of matter

Answer 7

Physical property

Question 8

What is the energy required to melt called
49
U2C2-solutions

Answer 8

Heat of fusion

Question 9

States of matter triangle
50
U2C3- states of mater

Answer 9

From liquid to gas is evaporation from solid to liquid is melting from solid to gas it’s deposition from a gas to a liquid it’s condensation from a liquid to a solid is freezing
From gas to solid is suspension

Question 10

Bose Einstein condensate are used to simulate conditions____
52
U2C3 states of matter

Answer 10

In Black holes

Question 11

Three parts of the kinetic molecular theory
54
U2C3 states of mater

Answer 11

All things are made of small particles these particles are in constant motion
Particles with more mass move more slowly than particles with Less mass

Question 12

A piece of wood that measures 3 cm x 6 cm x 4 cm has a mass of 80 g what is the density of the wood would it float in water

56
Practice Density calculations

Answer 12

Find density of wood 
given 3 cm x 6 cm x 4 cm and 80 g formula length times with times height equals volume 
substitution 3×6×4 equals Volume 
Solve 3×6×4 = 72 mL centimeters cubed
Formula mass over volume equals density
Substitution 80/72 equals density
Solve 80/72= 1.11g/mL 
Explanation no the word is more dense than water it has .1 repeating more dense than water therefore it will sink

Question 13

Find the mass of a 50 mL volume of water if the density of the water is 1 g/mL
57
Practice density calculations

Answer 13

For the solved I needed to do instead 50 /1=50
50mL/1 g/mL= 50g
Because the milliliters cancel it would be 50 g

Question 14

Name one similarity between compounds and homogeneous mixtures and one difference

59
U2C1 classification of matter

Answer 14

Compounds are chemically combined while homogeneous mixtures are not chemically combined however they are both pure

Question 15

Explain how salt dissociates in water
60
U2C4-solutions

Answer 15

When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules. … Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together.

Question 16

Iron and oxygen react to form rust what will happen to the mass of the rust color compared to the mass of the iron and the oxygen before the reaction

53
Popcorn lab/ conservation of mass

Answer 16

Because these chemicals combine it gets heavier the atomic weights are combined and it gets heavier because the mass can’t leave due to the conservation of mass

Question 17

What is the energy required to go from liquid to solid called
49
U2C2-solutions

Answer 17

Heat of evaporation