Empirical and Molecular Formulas
Molar Mass
% Composition
Stoichiometry
Misc.
100
The reduced/ simplified version of the chemical formula
What is the empirical formula?
100
The unit for molar mass
What is grams/ mol
100
The formula for percent composition
% composition= (mass of part/ mass of whole) x 100
100
The number you use when converting from grams to moles or moles to grams.
What is molar mass (found on the Periodic Table)?
100
The number of atoms in any mole of a substance
6.02 x 1023 atoms
200
The empirical formula of the compound whose molecular formula is C6H12O6
What is CH2O?
200
The molar mass of Carbon
What is 12 g/mol?
200
The percent by mass of oxygen in CO is
What is 57%
200
The number you use when converting from moles of one substance into moles of another substance
What is the mole ratio (coefficients found in the balanced equation)?
200
In a chemical reaction, the reactant which limits the amount of reactants formed
Limiting reactant
300
The molecular and empirical formula of the following compound:
Molecular: C4H10O2
Empirical: C2H5O
300
The gram molecular mass of 1 mole of C3H5(OH)3
What is 92 grams/ mole?
300
The percent by mass of Hydrogen in NH3
17.6%
300
The amount of moles present in 11 grams of CO2
What is 0.25 moles?
300
This is the coefficient in front of Hydrogen gas in the balanced form of the following equation:
__H2 + __O2 -> __H2O
What is 2
400
The empirical formula of a compound whose composition by mass is 50% sulfur and 50% oxygen
What is SO2?
400
The gram molecular mass of CO2 is the same as the gram molecular mass of
a) CO b) SO2 c)C2H6 d)C3H8
What is d) C3H8?
400
The percent by mass of oxygen in Fe2O3
What is 30%
400
The mass (in grams) of 4.76 moles of Na3PO4
What is 781 grams?
400
The grams of hydrogen that will be produced if we start with 2 moles of HCl and excess magnesium?
Mg + 2HCl --> MgCl2 + H2
What is 2 grams of H2
500
The molecular formula for a compound that has an empirical formula of CH2 and a molecular mass of 56.
What is C4H8?
500
The molar mass of Ca3(PO4)2
What is 310 g/mol?
500
The percent by mass of Oxygen in Na2SO4
45%
500
Given the reaction:
Cu + 4HNO3 -> Cu(NO3)2 + 2H2O + 2NO2
The total mass of H2O produced when 32 grams of Cu is completely consumed
What is 18g?
500
There are 100.0 grams of each reactant available. Determine the limiting reactant in this equation.
SO2 + 2NaOH → Na2SO3 + H2O
What is NaOH