Density
Prop of Matter
States of Matter
Atoms/Table
Chem Reactions
100
Fresh eggs always sink in water. Nick heard that adding salt to water could make the egg float. Nick decided to test this idea. He prepared 4 cups of water. Cup #1 had pure water, Cup #2 had 1 teaspoon of salt added, Cup #3 had 2 teaspoons of salt added, and Cup #4 had 3 teaspoons of salt added. Nick then added a fresh egg to each of the cups and observed if the eggs floated or not. What is the independent variable in this experiment?
What is salt?
100
If the mass in a closed system is measured out to be 15 grams of Na (Sodium), 25 grams of Cl (Chlorine), and 50 grams of O (Oxygen), what would be the mass if you burned the Sodium and the Chlorine?
What are 90 grams?
100
How do the particles in a solid act?
What is vibrate in place?
100
The smallest unit that retains the properties of an element...
What is an atom?
100
The chemical formula for a compound tells us...
What are the elements it contains?
200
The table provides identities of substances based on density. A sample of an unknown substance has a mass of 28.8 g and a volume of 4 cm³ Based on its density, it could be which of the following substances?
What is Tin?
200
What is occurring at #4?
What is a phase change?
What is vaporization?
200
How does the distance between particles relate between solids, gases, and liquids?
How are gases furthest apart, then liquids, solids are closest together.?
200
What are the elements in Group 2 called?
What are Alkaline Earth Metals?
200
What does it mean for a chemical equation to be balanced?
What is the same number of atoms of each element on each side of the reaction? Same molar mass(amu)
300
If a ball that has a density of 1.73 g/cm3 is placed in the beaker, where will the ball come to rest?
What is between C and D?
300
What state of matter is represented by #3?
What is a liquid?
300
If a container of gas gets larger while the temperature remains the same, the pressure __________.
What is decreases?
300
What do the Groups/Periods tell us about an element?
Specify which tells what
What are the number of VE and the number of energy levels?
300
A substance that increases the reaction rate by decreasing the activation energy is a(an)_______.
What is a catalyst?
400
Calculate the missing information for each object. Put your answer in this format. (density should be in g/cm³)
A: answer with units (just put your density units like this g/cm3)
B: answer with units
C: answer with units (put volume as cm3)
What is 24,050 grams?
400
The volume of water in a beaker was 215 mL. After 5 days, the volume of the water was 200 mL. What best explains the change in volume?
What is evaporation?
400
Whose Law states that When temperature increases, so will Volume?
What is Charles' Law?
400
What determines the reactivity of an element?
What are the number of unpaired valence electrons?
400
When chemical bonds break, energy is
What is absorbed?
500
A: answer with units (just put your density units like this g/cm3)
B: answer with units
C: answer with units (put volume as cm3)
What is .3cm3?
500
A student is given a sample of an unknown liquid to test in the laboratory. The student thinks that the liquid is water. Which of the following physical properties of the sample is MOST helpful to determine if the liquid is water?
Color, Mass, Volume, Boiling Point
What is Boiling Point?
500
Which segment or segments in this graph represent an increase in the average kinetic energy of the water?
What are A and C?
500
An atom has 47 protons and an atomic mass of 108. How many neutrons does this atom have?
What are 61 neutrons?
500
Cl₂ + NaBr → NaCl + Br₂ The equation to the left is not balanced. Balance this equation
What is Cl₂ + 2NaBr → 2NaCl + Br₂ ?