Stoichiometry
How many moles of H₂O are formed from the complete combustion of 45.0 g CH₃OH?
2.81 mol of water are formed.
What is the molarity of 21.3 g of (NH₄)₃PO₄ in 250.0 mL solution?
0.572 M
What is the formula for the hydronium ion?
H₃O⁺
What is the percent yield when 225 g C produces 195 g CS₂?
68.4%
What is emitted during beta decay?
An electron
How many grams of TiCl₄ are needed to produce 0.132 mol of MgCl₂?
12.6 g of TiCl₄ are needed.
What volume of 0.275 M NaNO₃ contains 12.5 g NaNO₃?
535 mL
Which is true about strong acids?
Strong acids are almost completely ionized in water.
How many moles of reactants remain when 10 mol Fe₂O₃ reacts with 24 mol CO?
0.00 mol Fe₂O₃ and 8.00 mol CO remain.
What is the nuclear equation for the alpha decay of ²¹⁰Pb?
²¹⁰Pb → ²⁰⁶Hg + ⁴He
How many grams of C₁₄H₉Cl₅ are formed from 25.0 g of each reactant?
121 g of C₁₄H₉Cl₅ are produced.
What volume of 3.75 M NaOH is needed to make 500.0 mL of 2.00 M NaOH?
267 mL
What has the highest concentration when 0.10 mol of HCN dissolves in water?
HCN
How do you determine the limiting reactant in a chemical reaction?
The limiting reactant is the one that produces less product.
What particle is released when a neutron changes into a proton?
A beta particle is a high-energy electron.
What is the maximum possible amount of product from a reaction called?
Theoretical yield.
What is the Li⁺ concentration in a 2.5 M solution of Li₂SO₄?
5.0 M
What is the reducing agent in the reaction: Zn + CuSO₄ → ZnSO₄ + Cu?
Zn
How many grams of product form when 25.0 g of each reactant react in C₂HOCl₃ + 2 C₆H₅Cl → C₁₄H₉Cl₅ + H₂O?
25.0 g of each reactant yields 121 g of product.
What nuclear change occurs during positron emission?
Positron emission increases the atomic number.
If 10.0 g N₂O₄ reacts with 4.50 g N₂H₃CH₃ but only 0.57 g N₂ is formed, what is the percent yield?
0.57 g is the actual yield, % yield is very low.
How many grams of CaCO₃ are needed to react with 50.0 mL of 0.155 M HCl?
0.341 g of CaCO₃ is needed.
What is the net ionic equation for AlCl₃ reacting with NaOH?
Al³⁺ + 3 OH⁻ → Al(OH)₃(s)
Calculate the mass of N₂ produced from 10.0 g N₂O₄ and 4.50 g N₂H₃CH₃.
10 mol N₂O₄ and 4.50 g N₂H₃CH₃ → ? g of N₂.
What is the product when ²¹⁰Pb undergoes beta decay?
²¹⁰Pb + β⁻ → ²¹⁰Bi