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Scientific Laws
Scientific Models
Chemical Reactions
Stoichiometry
Labs
100
A gas law that states the volume of a gas, is inverse to its pressure, at constant temperature.
What is Boyle's Law?
100
A scientific model that uses electron dot structures to show how electrons are arranged in molecules. Pairs of dots, or lines, represent bonding pairs.
What is the Lewis Model?
100
The compounds to the left of the yield sign.
What are reactants?
100
Single-replacement, Double-replacement, Synthesis, Combustion, and Decomposition.
What are the 5 types of chemical reactions?
100
The type bond that causes salt to have a higher melting point than sugar or paraffin.
What is an ionic bond?
200
A law that states that a volume of gas is directly proportional to its kelvin temperature at constant pressure.
What is Charles's Law?
200
A model that describes the atom as composed of a dense, positively-charged nucleus that is surrounded by negative electrons.
What is Rutherford's Atomic Model?
200
The number in front of each chemical compound in the chemical equation, that indicates the numbers of each element that makes up that compound.
What is a coefficient?
200
The molar ratio of NaOH to H2O in the following chemical reaction: NaOH + HCL --- NaCl + H2O.
What is 1:1?
200
A type of bond held together by positive and negative electrostatic forces, that result from the complete transfer of an electron.
What is an ionic bond?
300
A law that states that in any chemical reaction, or physical process, energy may change from one form to another, but it is neither created nor destroyed.
What is the Law of Conservation of Energy?
300
An atomic model, based on a study of the hydrogen atom, that states that electrons give off energy in the form of an emission spectrum of light when the electrons drop from higher energy orbits to lower energy orbits.
What is Bohr's Atomic Model?
300
An ionic bond.
What type of bond do metals and nonmetals form?
300
The number of molecules in one mole.
What is 6.02 x 10E23?
300
A type of bond that causes a compound to have a lower melting point.
What is a covalent bond?
400
A law that states that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass.
What is the Law of Definite Proportions?
400
An atomic model that assumes that electrons have wave-like properties, and that wave-like motion of the electron is restricted to fixed circular orbits of fixed radius, such that only certain wavelengths, frequencies, and energies, are possible.
What is the Quantum Mechanical Atomic Model?
400
A charged, polar covalent molecule.
What is a molecule that shares electrons unequally?
400
Count the number of each element in the compound. Multiply that number by the atomic mass unit for each element. Then you add the product total for all elements in the compound.
How do you determine the molar mass of a compound, made up of several elements?
400
It increased in the pippette, when you squeezed the bottle in the Cartesian Diver Toy Lab.
What is pressure?
500
A law that states that matter is neither created nor destroyed during a chemical reaction, it is conserved.
What is the Law of Conservation of Matter?
500
A model based on an arrangement of electrons that minimizes the repulsion of shared and unshared electron pairs around the central atom. The model describes molecular shape.
What is the Valence Shell Electron Pair Repulsion (VSEPR) Model?
500
First, you write the skeleton equation for the reaction. Then, you count the atoms of each element in the reactants. Then, you count the atoms of each element in the products. Next, you change the coefficients to make the number of atoms of each element equal on each side of the equation. Finally, you write the coefficients in the lowest possible ratio.
What are the steps for balancing chemical equations?
500
You have 20 moles of H2 on hand and plenty of O2, so that you can produce ____ moles of H2O, for the following chemical reaction: 2H2 + O2 ---- 2H2O
What is 20 moles of H2O?
500
As you increase one variable, the other variable decreases.
What is an inversely proportional relationship?