stoichiometry test
in the reaction represented by the equation c+2h2—> CH4, what is the mole ratio of hydrogen to methane?
2:1
in the reaction represented by the equation N2+3H2->2NH3, what is the mole ratio of hydrogen to ammonia?
3:2
C3H8+5O2-> 4H2O+3CO2 what is the mole ratio of water to oxygen gas?
4:5
what is the measured amount of a product obtained from a chemical reaction?
actual yield
coefficients are used for
both a and b
to balance a chemical equation, it may be necessary to adjust the
coefficients
what is the study that deals with the mass relationships of elements in compounds?
composition stoichometry
which of the following is the substance that is not used up completely in a chemical reaction?
excess reactant
which reactant controls the amount of product formed in a chemical reaction?
limiting reactant
in the reaction represented by the equation CH4(g)+2O2(g)—>CO2(g) + 2H2O(g), a mass of 125 g CH4 is reacted with excess oxygen. The expression is used to calculate the
mass of water produced
_______ is a conversion factor that relates the amounts in moles of any two substances involved in chemical reaction
mole ratio
a balanced chemical equation allows one to determine the
mole ratio of any two substances in the reaction
What is the study of the mass relationships among reactants and products in a chemical reaction?
reaction stoichiometry
when the limiting reactant in a chemical reaction is completely used
the reaction stops
what is the maximum possible amount of product obtained in a chemical reaction?
theoretical yield