States of Matter
Changes in States
Counting Atoms & Making Molecules
Physical & Chemical Properties
Reactions
100
This state of matter has some energy, some movement, keeps its own volume, and takes the shape of its container.
Liquid
100
What is the change of state called when going from a liquid to a solid?
Freezing
100
Count the atoms in this formula. *Make sure to use the format taught in class.
Ammonia NH3
N= nitrogen = 1
H= hydrogen = 3
Total # = 4
100
Is viscosity a physical or chemical property?
physical - a liquid's resistance to flow
100
What are the two types of heat transfers we discussed in class?
Endothermic
Exothermic
200
A physical property that describes the relationship between molecules and is affected by energy is __________.
Matter
200
What happens to a gas if thermal energy is taken away?
Condenses to a liquid
200
Draw a molecule to represent Aluminum Oxide
Al2O3
200
How do you calculate density?
Find the volume l x w x h
Find the mass
D = mass/volume
200
An ice pack is an example of an _______________ reaction.
A hand warmer is an example of an ______________ reaction.
ice pack = endothermic reaction
hand warmer = exothermic reaction
300
List the 4 types of matter in order from LEAST amount of energy to the MOST amount of energy.
Solid, Liquid, Gas, Plasma
300
If a substance is melting, the particles are _______________ and __________________.
spreading apart and moving faster
300
Label this reaction with yield, products, and reactants
CH4 + 2O2 → CO2 + 2H2O
CH4 + 2O2 → CO2 + 2H2O
reactants yields products
300
When drawing a pH scale,
what is the number range?
where areas would you find neutral, base and acid
Number range 0-14
acid 0-6
neutral 7
basic 8-14
300
Which graph shows the products lower than the reactants because energy was released?
exothermic reaction
400
When interpreting a graph of changing states, the slanted line represents the _______________ and the flat line represents the _____________________.
States of matter
Changes in state
400
In the phenomena, the dry ice was going through ______________that is going from a solid to a gas.
Sublimation
400
Write the formula for the molecule below.
CaCO3
400
In the Mix It Up lab, the milk and vinegar formed a solid (curds). This is an example of what indicator of a chemical change
precipitate formed- 2 liquids form a solid
400
An inhibitor is a factor that can help control a chemical reaction. Give an example of an inhibitor.
using food preservatives to slow the spoilage process
500
What state of matter is rarely found on Earth?
Plasma
500
List the changes in state when thermal energy is removed from a gas and then from a liquid to then become a solid.
gas to a liquid = condensation
liquid to a solid = freezing
500
Count the amount of atoms in the formula. *Make sure to use the format from class.
Ammonium sulfate (NH4)2SO4
N= nitrogen =2
H= hydrogen =8
S= sulfur = 1
O= oxygen = 4
Total # = 15
500
Indicate whether the examples below are physical properties (PP) or chemical properties (CP)
rusting car
dripping toothpaste
strawberries are edible
rusting car CP
dripping toothpaste PP
strawberries are edible CP
500
When baking box brownies, the water used in the creation is considered a ________________.
catalyst