Equations/Math
What is the number of moles in 22.4 L of a gas at STP?
1 mole.
As you move left to right across the periodic table, atomic radius generally does what?
Decreases.
According to the Bohr Model, what can you conclude about the location of electrons?
Electrons are found in orbitals.
Which is more polar: NH3 or CO2?
NH3
Identify reaction: Fe+CuSO4 -> FeSO4+Cu
Single replacement.
Balance this equation:
H2+O2->H2O
2H2 +O2->2H2O
Which element has a higher electronegativity: Oxygen or Nitrogen?
What is the electron configuration of Na in the ground state?
2-8-1
What type of bonding is present in NH3?
Covalent.
Identify reaction: 2KClO3 -> 2KCl+3O2
Decomposition.
How many moles are in 36 grams of H2O? (Molar mass=18 g/mol)
2 moles.
As you go down group 4 on the periodic table, what happens to the ionization energy?
Decreases.
What is the charge of an atom with 12 protons and 10 electrons?
+2
Which molecule is nonpolar and why:
CO2 or H2O?
CO2, symmetrical
Predict products: Na2SO4 + BaCl2 ->
BaSO4 + 2NaCl
What is the molarity of a solution with 2 moles of solute in 1 liter of solution?
2 M
Which element has the largest atomic radius: Na, Mg, or Al?
Na.
Which subatomic particle has the least mass?
Electron.
What is the type of bond in H-Cl using electronegativity values?
Polar covalent.
Precipitate, color change, temperature change, etc
What is the concentration in parts per million if 2 mg of solute is dissolved in 1 L of water.
Why does atomic radius decrease across a period?
Increasing nuclear charge pulls electrons closer to the nucleus.
How many valence electrons does sulfur have?
6
Using Table S, which bond is more polar: C-O or C-H?
C-O
Identify the reaction: AgNO3 +NaCl -> AgCl +NaNO3
Double replacement