Gas Laws & Scientific Thinking
What happens to gas particles when temperature increases?
They move faster
What are the three common states of matter?
Solid, Liquid, Gas
What subatomic particle has a positive charge?
Proton
What must be the same on both sides of a chemical equation?
Number of each type of atom
What unit is commonly used in stoichiometry calculations?
Moles
What law states that volume increases as temperature increases?
Charles's Law
Is melting ice a physical or chemical change?
Physical Change
Where are electrons found in an atom?
Electron Cloud
What law states matter is neither created nor destroyed?
Law of Conservation of Mass
How many grams are in 1 mole of an element equal to its…?
Molar Mass
What happens to gas pressure when volume decreases?
Pressure Increases
What type of change forms a new substance?
Chemical Change
What determines an element’s identity?
Number of protons
What do coefficients tell you in a chemical equation?
The number of molecules or moles
What information do mole ratios come from?
Balanced Chemical Equations
What gas law relates pressure and volume?
Boyle's Law
Is tearing paper a physical or chemical change?
Physical Change
What column on the periodic table is called a group or family?
Vertical Column
Balance this equation:
H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
How many moles of O₂ are needed to react with 2 moles of H₂ in this equation?
2H₂ + O₂ → 2H₂O
1 mole of O₂
What is a testable explanation based on observations called?
Hypothesis
Rusting iron is an example of what type of change?
Chemical Change
What do you call a substance made of two or more elements chemically bonded?
Compound
Why do we balance chemical equations?
To follow the Law of Conservation of Mass
If you have 4 moles of H₂, how many moles of H₂O can be produced?
2H₂ + O₂ → 2H₂O
4 moles of H₂O