Empirical Formula and Mass composition
Determine the percentage composition of Mg in Mg(OH)2
41.68%
The coefficients in a chemical equation represent the
relative number of moles of reactants and products
What is the difference between the limiting reactant and the excess reactant in a chemical reaction?
The limiting reactant is the reactant that controls the amount of product formed in a chemical reaction. The excess reactant is the substance that is not completely used up in a reaction.
What is the formula for percent yield?
actual yield/ theoretical yield x 100%
What is the molecular formula of the molecule that has an empirical formula of CH2O and a molar mass of 120.12 g/mol
C4H8O4
mole ratio of any two substances in the reaction
In the reaction below 2.0 mol HCl react with 2.5 mol NaOH what is the limiting reactant?
HCl + NaOH -> NaCl + H2O
HCl
the actual yield of a chemical reaction is generally greater than, equal to, or less than the theoretical yield
less than
Determine the empirical formula of a compound containing 52.11% carbon, 13.14% hydrogen, and 34.75% oxygen
C2H6O
Balance the equation
N2O + O2 -> NO2
2N2O + 3O2 -> 4NO2
What is the empirical formula of a compound which consists of 89.14% Au and 10.80% of O ?
Au2O3
In the equation 2Al2O3 -> 4Al + 3O2 what is the mole ratio of aluminum to oxygen?
4:3
A sample is 38.7% carbon, 9.62% hydrogen, and 51.6% oxygen and its molar mass is 62g. What is its molecular formula?
(EFM CH3O)
C2H6O2
How many mole ratios can be correctly obtained from the chemical equation
2Al2O3 -> 4Al + 3O2
6