Ch. 9 Chem test
For the reaction Pb(NO3)2 + 2KI ---- PbI2 + 2KNO3, how many moles of lead iodide are produced from 300. g of potassium iodine
0.903 mol
for the reaction Cl2 + 2KBr --> 2KCl + Br2, how many grams of potassium chloride can be produced from 119 g of potassium bromide
1.00 mol
For the reaction 2H2 + O2 ® 2H2O, how many grams of water are produced from 6.00 mol of hydrogen?
108 g
For the reaction 2Na + 2H2O → 2NaOH + H2, how many grams of sodium hydroxide are produced from 3.0 mol of water?
120 g
In the reaction Ca + Cl2 ---- CaCl2, what is the mole ratio of chlorine to calcium chloride
1:1
In the reaction Zn + H2SO4 ---- ZnSO4 + H2, what is the mole ratio of zinc to sulfuric acid
1:1
In the reaction 2H2 + Os ---- 2H2O, what is the mole ratio of oxygen to water
1:2
In the reaction N2 + 3H2 ---- 2NH3, what is the mole ratio of nitrogen to ammonia
1:2
For the reaction C + 2H2 --- CH4, how many moles of hydrogen are required to produce 10 mol of methane, CH4
20 mol
In the reaction C + 2H2 ---- CH4, what is the mole ratio of hydrogen to methane
2:1
For the reaction 3Fe + 4H20 ---- Fe3O4 + 4H2, how many moles of iron oxide are produced from 500 g of iron
3 mol
The Haber process for producing ammonia commercially is represented by the equation N2(g) + 3H2(g) ---- 2NH3(g). To completely convert 9.0 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required
3.0 mol
For the reaction SO3 + H2O ---> H2SO4, how many grams of sulfur trioxide are required to produce 4.00 mol of sulfuric acid?
320. g
In the equation 2lClO3 ---- 2KCl + 3O2, how many moles of oxygen are produced when 3.0 mol of KClO3 decompose completely
4.5 mol
In the reaction 2Al2O3 -> 4Al + 3O2, what is the mole ratio of aluminum to oxygen?
4:3
For the reaction 2Fe + O2 -> 2FeO, how many grams of iron oxide are produced from 8.00 mol of iron?
574 g
For the reaction 2HNO3 + Mg(OH)2 ® Mg(NO3)2 + 2H2O, how many grams of magnesium nitrate are produced from 8.00 mol of nitric acid, HNO3?
592 g
For the reaction CH4 + 2O2 -> CO2 + 2H2O, how many moles of carbon dioxide are produced from the combustion of 100. g of methane?
6.23 mol
For the reaction AgNO3 + NaCl -> NaNO3 + AgCl, how many moles of silver chloride, AgCl, are produced from 7 mol of silver nitrate AgNO3?
7.0 mol
For the reaction 2Na + Cl2 ---- 2NaCl, how many grams of chlorine gas are required to react completely with 2.00 mol of sodium
70.9 g
For the reaction HCl + NaOH ---- NaCl + H2O, how many moles of hydrochloric acid are required to produce 150. g of water
8.32 mol
For the reaction N2 + 3H2 -> 2NH3, how many moles of nitrogen are required to produce 18 mol of ammonia?
9.0 mol
What is the study of the mass relationships of elements in compounds?
Composition stoichiometry
In the chemical reaction wA + xB ---- yC + zD, a comparison of the number of moles of A to the number of moles of C would be a
Mole ratio
Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?
Stoichiometry
If one knows the mole ratio of a reactant and product in a chemical reaction, one can
calculate the mass of the product produced from a known mass of reactant
If one knows the mass and molar mass of reactant A and the molar mass of product D in a chemical reaction, one can determine the mass of product D produced by using the
mole ratio of D to A from the chemical equation
A balanced chemical equation allows one to determine the
mole ratio of any two substances in the reaction
Which of the following would not be studied in the branch of chemistry called stoichiometry
the amount of energy required to break the ionic bonds in calcium fluoride
In the chemical equation wA + xB ---- yC + zD, if one knows the mass of A and the molar masses of A, B, C, and D, one can determine
the mass of any of the reactants or products
Which of the following would be investigated in reaction stoichiometry
the mass of potassium required to produce a known mass of potassium chloride