Combination vs. Decomposition & Combustion Analysis
Balancing Equations
Simple Stoichiometry and Isotopes
Simple Stoichiometry and Percent Yield
Mole theory and Limiting Reactants
100
CaCO3(s) ---> CaO(s) + CO2(g)
What is decomposition
100
__ NaCl + __ BeF2 --> __ NaF + __ BeCl2
What is 2 NaCl + 1 BeF2 --> 2 NaF + 1 BeCl2
100
How many moles of nitrogen are in 3 moles of N2S3?
What is 6
100
How many atoms of hydrogen are in 2 moles of C6H12O6?
What is 1.445 x 10^25
100
6.0223 x 10^23; the number of atoms in a mole of an element, molecules in a mole of a compound…
What is Avogadro's Number
200
CaO(s) + SO2(g) ---> CaSO3(s)
What is combination
200
__FeCl3 + __Be3(PO4)2 --> __BeCl2 + __FePO4
What is 2 FeCl3 + 1 Be3(PO4)2 --> 3 BeCl2 + 2 FePO4
200
How many atoms of Br are in one atom of Br2?
What is 2
200
How much H2SO3 is required to create 150 g of SO2(g) given the reaction H2SO3(aq) → H2O(l) + SO2(g)
What is 192.15 g
200
What mass of water will be created when 8.5 g of NH4OH(aq) dissociates according to the equation below? NH4OH(aq) → NH3(g) + H2O(l)
What is 4.37 g
300
NH3 + HCl → NH4Cl
What is combination
300
__AgNO3 + __LiOH --> __AgOH + __LiNO3
What is 1 AgNO3 + 1 LiOH --> 1 AgOH + 1 LiNO3
300
Silver (Atomic weight 107.868) has two naturally-occurring isotopes with isotopic weights of 106.90509 and 108.90470. What is the percentage abundance of the lighter isotope?
What is 51.839%
300
According to the following equation, Calculate the percentage yield if 550.0 g of toluene added to an excess of nitric acid provides 305 g of the product, nitrotoluene C7H8 + HNO3 --> C7H7NO2 + H2O
What is 37.2%
300
When iron (II) hydroxide is mixed with phosphoric acid, iron (II) phosphate precipitate results. If 3.20 g of Fe(OH)2 is treated with 2.50 g of phosphoric acid, what is the limiting reagent? 3 Fe(OH)2 (aq) + 2H3PO4 (aq) → Fe3(PO4)2 (s) + 6H2O(l)
What is Fe(OH)2
400
Combustion analysis of naphthalene, a hydrocarbon used in mothballs, produced 8.80g CO2 and 1.44g H2O. Find the empirical formula.
What is C5H4
400
__CH4 + __O2 --> __CO2 + __H2O
What is 1 CH4+ 2 O2 --> 1 CO2 + 2 H2O
400
Chlorine has two isotopes: chlorine-35 (mass 34.9689 amu) and chlorine-37 (mass 36.9659 amu). What is the percentage abundance of these two isotopes if chlorine's atomic mass is 35.453
What is Cl-35 75.78%, Cl-37 24.24%
400
Quicklime, CaO, can be prepared by roasting limestone, CaCO3, according to the chemical equation below. When 2.00 x 103 g of CaCO3 are heated, the actual yield of CaO is 1.50 x 103 g. What is the percentage yield? CaCO3 --> CaO + CO2
What is 93.8%
400
Chlorine gas reacts with silica, SiO2, and carbon to give silicon tetrachloride and carbon monoxide. How much CO gas can be produced from 15.0 g of silica? 2 Cl2 (g) + SiO2 (s) + 2 C (s) → SiCl4 (l) + 2 CO (g)
What is 14.0 g of CO gas
500
A 1.50 g sample of hydrocarbon undergoes complete combustion to produce 4.40 g of CO2 and 2.70 g of H2O. What is the empirical formula of this compound?
What is CH3
500
__Mg + __Mn2O3 --> __MgO + __Mn
What is 3 Mg + 1 Mn2O3 --> 3 MgO + 2 Mn
500
The natural abundance for boron isotopes is: 19.9% 10B (10.013 amu) and 80.1% 11B (11.009amu). Calculate the atomic weight of boron.
What is 10.811
500
Aluminum reacts with an aqueous solution containing excess copper (II) sulfate. If 1.85 g Al reacts and the percentage yield of Cu is 56.6%, what mass of Cu is produced? Al + CuSO4 --> Cu + Al2(SO4)3
What is 3.70 g
500
If 0.45 mols of MnO2 can react with 48.2 g of HCl, how many grams of Cl2 could be produced? MnO2 + 4 HCl → MnCl2 + Cl2 + 2 H2O
What is 23.4 g Cl2
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