What is the proportional relationship between two or more substances during a chemical reaction
This is stoichiometry.
100
The total energy content of a sample.
What is enthalpy
100
Ions that do not react.
What are spectator ions
100
Ions in 0.5 mol NaCl.
What is 3.011 * 10^23
100
Shows the number and kinds of atoms in a molecule, but not the arrangement of the atoms.
What is a molecular formula
200
N2 + 3H2 --> 2NH3, this number of moles of hydrogen are needed to prepare 312 moles of ammonia.
What is 468 mol H2
200
Energy as heat needed to increase the temperature of 1 mol of the substance by 1K, of a pure substance.
What is the molar heat capacity
200
Lewis structures.
What is representing dots using valence electrons
200
Avogadro's number.
What is 6.022 * 10^23
200
Shows the elements and the smallest whole-number ratio of atoms or ions that are present in a compound.
What is the empirical formula
300
N2 + 3H2 --> 2NH3, this is the amount of NH3 that can be made from 1221 g H2 and excess N2.
What is 6867 g NH3
300
( Amount of moles )( molar heat capacity )( change in temperature ) =
What is heat
300
Series of elements that have similar properties and that are arranged in descending order of chemical activity.
What is the activity series
300
Conversions between moles and mass require the use of this.
What is molar mass
300
Can be used to calculate percentage composition.
What are chemical formulas
400
POCL3 (l) + 3H2O (l) --> H3PO4 (l) + 3HCl (g), this is the volume of NH3 that forms when 56 mL POCL3 completely reacts. Density of POCL3 = 1.67 g/mL, density of H3PO4 = 1.83 g/mL.
What is 33 mL H3PO4
400
Energy as heat needed to increase the temperature of 10.0 mol of mercury by 7.5 K. The value of C for mercury is 27.8 J/K * mol.
What is 2.1 * 10^3 J
400
A reaction in which a single compound breaks down to form two or more simpler substances.
What is decomposition
400
Used to calculate molar masses of compounds.
What are formulas
400
Chemical formulas reveal this.
What is composition
500
POCl3 + 3H2O --> H3PO4 + 3HCl, this is the limiting reactant, and another amount of theoretical yield of phosphorus acid, H3PO4, if 225g of PCl3 is mixed with 123g of H2O.
What is 134 g H3PO3
500
Molar enthalpy change when ice warms from -5.4 degrees Celsius to -0.2 degrees Celsius.
What is 0.19 kJ/mol
500
A small whole number that appears as a factor in front of a formula in a chemical equation.
What is a co-efficient
500
Determined from the empirical formula and the experimentally determined molar mass.
What is the molecular formula
500
The percentage composition of copper (I) sulfide, a copper ore called chalcocite.