Chem Test
593 g
For the reaction represented by the equation 2HNO3 + Mg(OH)2 --> 2H2O, how many grams of magnesium nitrate are produced from 8.00 mol of nitric acid, HNO3, and an excess of Mg(OH)2?
4.5 g
For the reaction represented by the equation 2Na + 2H2O = 2NaOH + H2, how many grams of hydrogen are produced if 120. g and 80. g of water are available?
70.9 g
For the reaction represented by the equation 2Na + Cl = 2NaCl, how many grams of chlorine gas are required to react completely with 2.00 mol of sodium
824. g
For the reaction represented by the equation 2Na + Cl2 -> 2NaCl, how many grams of sodium chloride can be produced from 500. g each of sodium and chlorine?
83.88%
For the reaction represented by the equation CH4 + 2O2 = 2H20 + Co2, calculate the percentage yield if 1500 g of methane react with excess oxygen to produce 1300 g of chlorine dioxide
6.23 mol
For the reaction represented by the equation CH4 + 2O2 = CO2 + 2H2O, how many moles of carbon dioxide are produced from the combustion of 100. g of methane
93.9%
For the reaction represented by the equation SO3 + H2O → H2SO4, calculate the percentage yield if 500. g of sulfur trioxide react with excess water to produce 575 g of sulfuric acid.
127 g
Metallic copper is formed when aluminum reacts with copper (II) sulfate. How many grams of metallic copper can be obtained when 54.0 g of Al reacts with 310 g of CuSO4
balanced chemical equation
Mole ratios for a reaction are obtained from the ____.
2.1 g O3
Ozone O3, is produced in automobile exhaust by the reaction represented by the equation NO2 + O2 = NO + O3 what mass of ozone is predicted to form from the reaction of 2.0 g NO2 in a car's exhaust and excess oxygen?
decomposition reaction
The equation AX = A + X
9
When the equation Fe3O4 + Al = Al2O3 + Fe is correctly balanced, what is the coefficient of Fe?
(aq)
aqueous, water
290 g
Aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum 2Al + 3H2SO4 =Al2(SO4) + 3H2
8.4 x 10^2 kg
Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCO3 = CaO +CO2 what is the mass of lime can be produced from 1.5 x 10^3 kg of limestone?
40.5 g
Copper reacts with 36.7 g of silver nitrate to produce copper (II) nitrate and silver. Determine the theoretical yield of Cu(No3)2 is the actual yield is 31.29 g
575 g
For the reaction represented by the equation 2Fe + O2 = 2FeO, how many grams of iron (II) oxide are produced from 8.00 mol of iron in an excess of water
12 mol
For the reaction represented by the equation 2H2 + O2 ---> 2H2O, how many moles of water can be produced from 6.0 mol of oxygen?
108 g
For the reaction represented by the equation 2H2 + O2 --> 2H2O, how many grams of water are produced from 6.00 mol of hydrogen?
2.98 mol
For the reaction represented by the equation 3Fe + 4H2O = Fe3O4 + 4H2, how many moles of iron (III) oxide are produced from 500 g of iron in an excess of H2O
7.0 mol
For the reaction represented by the equation AgNO3 + NaCl --> NaNO3 + AgCl, how many moles of silver chloride, AgCl, are produced from 7.0 mol of silver nitrate AgNO3?
91.0%
For the reaction represented by the equation Cl2 + 2KBr = 2KCl + Br2 calculate the percent yield if 200 g of chlorine react with excess potassium bromide to produce 410 g of bromide
1.00 mol
For the reaction represented by the equation Cl2 + 2KBr = 2KCl + Br2, how many moles of potassium chloride are produced from 119 g of potassium bromide?
84.2%
For the reaction represented by the equation Mg + 2HCl --> H2 + MgCl2, calculate the percentage yield of magnesium chloride if 100. g of magnesium react with excess hydrochloric acid to yield 330. g of magnesium chloride.
9
For the reaction represented by the equation N2 + 3H2 = 2NH3, how many moles of nitrogen are required to produce 18 mol of ammonia
0.904 mol
For the reaction represented by the equation Pb(NO3)2 + 2KI --> PbI2, how many moles of leab(II) iodide are produced from 3.00 of potassium iodide and an excess of Pb(NO3)2?
320. g
For the reaction represented by the equation SO3 + H2O = H2SO4 how many grams of sulfur trioxide are required to produce 4.00 mol of sulfuric acid in an excess of water?
%93.9
For the reaction represented by the equation SO3 + H2O = H2SO4. what is the percent yield if 500. g of sulfur trioxide reacts with excess water to produce 575 g of sulfuric acid?
90.0 g
How many grams of water are produced when 2.50 mol of Oxygen reacts with hydrogen?
1.67 mol
How many moles of glucose C6H12O can be "burned" biologically when 10.0 mol of oxygen is available?
31.2 mol
How many mols of carbon dioxide is produced when 10.4 mol of propane gas is burned in excess oxygen?
O2
How would oxygen be represented in the formula equation for the reaction of methane and oxygen to yield carbon dioxide and water?
22.5 mol
Hydrogen gas can be produced by reacting aluminum with sulfuric acid. How many moles of sulfuric acid are needed to completely react with 15.0 mol of aluminum 2Al + 3H2SO4 = Al(SO4)3 + 3H2
the mass of the reactants equals the mass of the productd
In a chemical reaction
4.5 mol
In the equation 2KClO3 - 2KCl + 3O2, how many moles of oxygen are produced when 3.0 mol of KClO3 decompose completely?
3:2
In the equation Al2(SO4)3 + 3Ca(OH)2 = 3CaSO4 + 2Al(OH)3 the mole ratio of calcium hydroxide to aluminum hydroxide is
4:3
In the reaction represented by the equation 2Al2O3 - 4Al + 3O2, what is the mole ratio of aluminum to oxygen?
1:2
In the reaction represented by the equation N2 + 3H2 = 2NH3 what is the mole ratio of nitrogen to ammonia?
synthesis reaction
In what kind of reaction do two or more substances combine to form a new compound?
displacement reaction
In what kind of reaction does one element replace a similar element in a compound?
H2
In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is
82%
Lead nitrate can be decomposed by heating. What is the percent yield of the decomposition reaction if 9.9 g Pb(NO3)2 are heated to give 5.5g of PbO? 2Pb(NO3)2(s) —> 2PbO(s) + 4NO2(g) + O2(g)
MgCl2(aq) and Br2 (l)
Magnesium bromide (aq) + chlorine (g) yields
efficiency
Percent yield of a product is a measure of a reaction's ________
245 g
SO3 + H2O —> H2SO4, how many grams of sulfuric acid can be produced from 200. g of sulfur trioxide and 100. g of water?
3.0 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?
synthesis reaction
The equation A + X = AX is the general equation for a(n)
double-displacement reaction
The equation AX + BY = AY + BX
2.00 g
The equation below shows the decomposition of lead nitrate. How many grams of oxygen are produced when 11.5 g NO2 is formed? 2Pb(NO3)2(s) —> 2PbO(s) + 4NO2(g) + O2(g)
synthesis reaction
The reaction represented by the equation 2Mg + O= 2MgO is a
double replacement reaction
The reaction represented by the equation Pb(NO3)2 + 2Kl = 2KNO3 is
coefficient
To balance a chemical equation, it may be necessary to adjust _
2Al + 3CuSO4 --> Al2(SO4)3 + 3Cu
What is the balanced equation when aluminum reacts with copper (II) sulfate?
6.8 g
What is the maximum number of grams of PH3 that can be formed when 6.2 g of phosphorus reacts with 4.0 g of hydrogen to form PH3
1.8 mol
When iron rusts in air, iron (III) oxide is produced. How many moles of oxygen react with 2.4 mol of iron in the rusting reaction? 4Fe(s) + 3O2(g)--> 2Fe2O3(s)
1,1,1
Which coefficients correctly balance the formula equation CaO + H2O ---> Ca(OH)2
1,1,2
Which coefficients correctly balance the formula equation NH4NO2(s) - N2(g) + H2O(l)?
limiting reactant
Which reactant controls the amount of product formed in a chemical reaction?
The limiting reagent is CO and 8.0 mol Fe will be formed
Which statement is true is 12 mol CO and 12 mol Fe2O3 are allowed to react? 3CO + Fe2O3 = 2Fe +3CO2
120 g
for the reaction represented by the equation 2Na + 2H2O = 2NaOH + H2, how many grams of sodium hydroxide are produced from 3.0 mol of sodium with an excess of water
20 mol
for the reaction represented by the equation C + 2H2 >>CH4, how many moles of hydrogen are required to produce 10 mol of methane, CH4?
decomposition reaction
in what kind of reaction does a single compound produce two or more simpler substances
4.77 g
what is the mass of potassium chloride when 2.50 g of potassium reacts with excess of chlorine gas?
a coefficient
what is the small whole number that appears in front of a formula in a chemical equation?
