The chemical species on the left side of a chemical equation.
What are the reactants?
100
A sample of a compound of Cl and O reacts with an excess of hydrogen gas to give 0.233 grams of HCl and 0.403 grams of water.
What is Cl2O7?
100
A reaction in which a substance burns in the presence of oxygen.
What is a combustion reaction?
100
The bond angle of H-N-H for the NH3 molecule.
What is <109?
100
Drawn to represent molecules and polyatomic ions, showing the arrangement of atoms and the positions of all valence electrons.
What are Lewis structures?
200
A term used for the phrase, "dissolved in water".
What is aqueous?
200
The number of moles of oxygen needed to combine with 0.212 moles of carbon to form CO.
What is 0.212 moles oxygen?
200
A reaction in which two or more products form from a single reactant.
What is a decomposition reaction?
200
The bond angle for a trigonal planar shaped molecule.
What is 120?
200
Two shared pairs of electrons.
What is a double bond?
300
The reactant that is consumed completely in a chemical reaction.
What is the limiting reactant?
300
The number of moles of oxygen needed to combine with 0.212 moles of carbon to form CO2.
What is 0.424 moles oxygen?
300
A reaction in which 2 or more reactants combine to form a single product.
What is a combination reaction?
300
The bond angle of water.
What is <<109?
300
An atom's ability to draw shared electrons toward itself.
What is electronegativity?
400
The amount of product of a reaction that will form if all the limiting reactant is consumed by the desired reaction.
What is the theoretical yield?
400
The name of the compound formed when 0.273 grams of Mg is heated strongly in a nitrogen gas atmosphere and produces a product weighing 0.378 grams.
What is Mg3N2, magnesium nitride?
400
The bond angle between the 2 axial positions of a trigonal pyramidal shaped molecule.
What is 180?
400
A quantitative measure of the polarity of a bond.
What is dipole moment (u)?
500
Measures the efficiency of a chemical reaction and calculated by using actual and theoretical yields.
What is percent yield?
500
The empirical formula of water.
What is H2O?
500
The bond angle formed between the atoms that form a square planar shaped molecule.
What is 90 degrees?
500
Quantifies the polarity of a bond, and is determined by comparing the measured dipole moment to the one predicted by assuming that the bonded atoms have discrete charges.