Basic Concepts
This is the only state of matter that is not a fluid.
What is solid?
Avogadro defined 1 mole as equal to this many particles.
What is 6.02 x 1023 particles?
The first step in finding the empirical formula of a compound, using percent composition values of elements, is to assume your sample is this mass.
What is 100 grams?
In a chemical reaction with multiple reactants, this is what we call the reactant that runs out first.
What is the limiting reactant?
OR What is limiting reagent?
This shows only the particles that truly participate in a chemical reaction.
What is the net ionic equation?
(Half-credit to ionic equation)
How many moles of Hg are there in 400g?
What is ~2 moles Hg?
A compound has an empirical formula of SO2F2 and a molecular weight of 102.2 g/mol. This is the molecular formula of that compound.
What is SO2F2?
OR What is the same as the empirical formula?
This is the first step you must take in any stoichiometry problem.
What is make sure the equation is balanced?
If the given value is in grams, whatever unit you're converting to, the first thing you must do is convert to ___________.
What is converting to moles.
How many moles of Silicon is 3.01 × 1023 atoms?
What is 0.5 moles of Silicon?
A compound has a molar mass of 30 g/mol and an empirical formula of CH3. This is the compound's molecular formula.
What is C2H6?
This is the mole ratio of hydrogen gas to water in the following equation, and this is the mole ratio of hydrogen atoms to oxygen atoms in the following equation. (Partial credit allowed)
2H2(g) + O2(g) -> 2H2O (l)
What is 1 mole H2 to 1 mole H2O
AND what is 2 moles H atoms to 1 mole of O atoms?
(Half-credit for only one of these)
Many behaviors of water molecules, in terms of surface tension and phase changes, can be explained by this specific intermolecular force.
What is hydrogen bonding?
OR What are hydrogen bonds?
How many moles of nickel is 176 grams?
What is ~3 moles?
A compound is found to contain 64.80 % carbon, 13.62 % hydrogen, and 21.58 % oxygen by weight. This is the empirical formula for the compound.
What is C4H10O?
C3H8 + 5 O2 ->3 CO2 + 4 H2O
If 4.5 moles of C3H8 combusts, how many moles of carbon dioxide will be produced?
What is 13.5 moles of carbon dioxide?
This theory states that all gas particles in an ideal gas are in random, constant, straight-line motion, are separated by great distances relative to their size, and have no attractive forces between them.
What is Kinetic-Molecular Theory?
OR What is Collision Theory?
(Not exactly the same thing, but close enough with what is given)
What is the mass of 4 moles of Iron?
What is ~224 grams?
A compound was found to contain 24.74% (by mass) potassium, 34.76% manganese, and 40.50% oxygen. This is its empirical formula AND, assuming the empirical formula is the same as its molecular formular, the compound's name. (Partial credit allowed)
What is KMnO4, potassium permanganate?
(300 points for the formula, 200 for the name)
CO + 2H2 -> CH3OH
If you use 2.24 liters of carbon monoxide in this reaction, how many moles of H2 would need to be used to react with all of the carbon monoxide?
What is (at least) 0.20 moles of H2?