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Terms in this set (100)
in order to predict whether or not a single-replacement reaction takes place, you need to consult a chart that shows the
activity series of metals
In order for the reaction 2Al+6HCL ---> 2AlCl3+3H2 to occur, which of the following must be true?
Al must be above H on the activity series
In a combustion reaction, one of the reactants is
In a double-replacement reaction, the
reactants are two ionic compounds
Which of the following statements is NOT correct?
all chemical reactions can be classified as one of five general types
Which of the following is a balanced equation representing the decomposition of lead (IV) oxide?
PbO2 ---> Pb + O2
What are the correct formulas and coefficients for the products of the following double-replacement reaction? RbOH+H3PO4 --->
Rb3PO4 + 3H2O
Which of the following statements is NOT true about that decomposition of a simple binary compound?
the products are unpredictbale
Which of the following statements is true about single-replacement reactions?
two reactants produce two products
In the activity series of metals, which metal(s) will displace hydrogen from an acid?
only metals above hydrogen
A double-replacement reaction takes place when aqueous Na2CO3 reacts with aqueous Sn(NO3)2. You would expect one of the products of this reaction to be
The complete combustion of which of the following substances produces carbon dioxide and water?
Which of the following is the correctly balanced equation for the incomplete combustion of heptene, C7H14?
C7H14 + 7O2 --> 7CO + 7H2O
The reaction 2Fe + 3Cl2 --> 2FeCl3 is an example of which type of reaction?
The equation Mg(s) + 2HCL(aq) ---> MgCl2(aq) + H2(g) is an example of which type of reaction?
The equation 2C3H7OH + 9O2 --> 6CO2 + 8H2O is an example of which type of reaction?
A double-replacement reaction takes place when aqueous cobalt (III) chloride reacts with aqueous lithium hydroxide. One of the products of this reaction is
What is the balanced chemical equation for the reaction that takes place between bromine and odium iodide?
Br2 + @NaI --> 2NaBr + I2
What is the driving force in the following reaction? Ni(NO3)2(aq) + K2S(aq) --> NiS(s) + 2KNO3(aq)
a precipitate is formed
If 1 egg and 1/3 cup of oil are needed for each bag of brownie mix, how many bags of brownie mix do you need if you want to use up all 3 eggs and 1 cup of oil?
What is conserved in the reaction shown below? H2(g) + Cl2(g) --> 2HCL(g)
mass, moles, molecules, and volume
What is conserved in the reaction shown below? N2(g) + 3F2(g) --> 2NF3(g)
mass and atoms only
In every chemical reaction
mass and atoms are conserved
In a chemical reaction, the mass of the products
is equal to the mass of the reactants
In any chemical reaction, the quantities that are preserved are
mass and number of atoms
In the reaction 2CO(g) + O2(g) --> 2CO2(g), what is the ratio of moles of oxygen used to moles of CO2 produced?
Which of the following is true about the total number of reactants and the total number of products in the reaction shown below? C5H12(l) + 8O2(g) --> 5CO2(g) + 6H2O(g)
9 moles of reactants chemically change into 11 moles of product
Which of the following is an incorrect interpretation of the balanced equation shown below? 2S(s) + 3O2(g) --> 2SO3(g)
2 g S + 3 g O2 --> 2 molecules SO3
How many moles of aluminum are needed to react completely with 1.2 mol of FeO?
2Al(s) + FeO(s) --> 3Fe(s) + Al2O3(s)
Calculate the number of moles of Al2O3 that are produced with 0.60 mol of Fe is produced in the following reaction.
2Al(s) + 3FeO(s) --> 3Fe(s) + Al2O3(s)
How many moles of glucose, C6H12O6, can be "burned" biologically when 10.0 mol of oxygen is available?
C6H12O6(s) + 6O2(g) --> Al2(SO4)3(aq) + 3H2(g)
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(s) + 3H2SO4(aq) --> Al2(SO4)3(aq) + 3H2(g)
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)
At STP, how many liters of oxygen are required to react completely with 3.6 liters of hydrogen to form water?
2H2(g) + O2(g) --> 2H2O(g)
Which type of stoichiometric calculation does not require the use of the molar mass?
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)
When glucose is consumed, it reacts with oxygen in the body to produce carbon dioxide, water, and energy. How many grams of carbon dioxide would be produced if 45 g of C6H12O6 completely reacted with oxygen?
Aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. How many grams of aluminum sulfate would be formed if 250 g H2SO4 completely reacted with aluminum?
Mercury can be obtained by reacting mercury (II) sulfide with calcium oxide. How many grams of calcium oxide are needed to produce 36.0 g of Hg?
4HgS(s) + 4CaO(s) --> 4Hg(l) + 3CaS(s) + CaSO4
How many moles of H3PO4 are produced when 71.0 g P4O10 reacts completely to form H3PO4?
P4O10(s) + 6H2O(l) --> 4H3PO4(aq)
How many grams of H3PO4 are produced when 10.0 moles of water react with an excess of P4O10?
P4O10(s) + 6H2O(l) --> 4H3PO4(aq)
How many liters of hydrogen gas are needed to react with CS2 to produce 2.50 L of CH4 at STP?
4H2(g) + CS2(l) --> CH(g) + 2H2S(g)
Which conversion factor do you use first to calculate the number of grams of CO2 produced by the reaction of 50.6 g of CH4 with O2? The equation for the complete combustion of methane is:
CH4(g) + 2O2(g) --> CO2(g) + 2H2O(l)
1 mol CH4/16.0 g CH4
WHich of the following statements is the about the following reaction?
3NaHCO3(aq) + C6H8O7(aq) --> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)
1 mol of water is produced for every mole of carbon dioxide produced
When 0.1 mol of calcium reacts with 880 g of water, 2.24 L of hydrogen gas form (at STP). How would the amount of hydrogen produced change if the volume of water was decreased to 440 mL (440g)?
The volume of hydrogen produced would be the same
Glucose, C6H12O6, is a good source of food energy. When it reacts with oxygen, carbon dioxide and water are formed. How many liters of CO2 are produced with 126 g of glucose completely react with oxygen?
C6H12O6(s) + 6O2(g) --> 6CO2(g) + 6H2O(l) + 673 kcal
Calcium oxide, or lime, is produced by the thermal decomposition of limestone in the reaction CaCO3(s) --> CaO(s) + CO2(g). What mass of lime can be produced from 1.5 x 10^3 kg of limestone?
8.4 x 10^2 kg
Which of the following is NOT true about limiting and excess reagents?
The reactant that has the smallest given mass is the limiting reagent
How many grams of chromium are needed to react with an excess of CuSO4 to produce 27.0 g Cu?
2Cr(s) + 3CuSO4(aq) --> Cr2(SO4)3(aq) + 3Cu(s)
How many grams of beryllium are needed to produce 36.0 g of hydrogen? (Assume an excess of water.)
Be(s) + 2H2O(l) --> Be(OH)2(aq) + H2(g)
How many liters of NH3, at STP, will react with 5.3 g O2 to form NO2 and water?
4NH3(g) + 7O2(g) --> 4NO2 + 6H2O(g)
How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O2 at STP?
4HCl(g) + O2(g) --> 2Cl2(g) + 2H2O(g)
O2; 6.0 L CO2
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 react with 319 g of CuSO4?
Al + 3CuSO4 --> Al2 (SO4)3 + 3Cu
Which statement is true if 12 mol CO and 12 mol Fe2O3 are allowed to react?
3CO(g) + Fe2O3(s) --> 2Fe(s) + 3CO2(g)
The limiting reagent is CO and 8.0 mol Fe will be formed
WHich of the following would be the limiting reagent in the reaction shown below?
2H2(g) + O2(g) --> 2H2O(g)
50 molecules of H2
Which of the following is NOT true about "yield"?
the actual yield may be different from the theoretical yield because reactions do not reagent was used
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 5.5 g of PBO?
2Pb(NO3)2(s) --> 2PbO(s) + 4NO2(g) + O2(g)
In a particular reaction between copper metal and silver nitrate, 12.7 g Cu produced 38.1 g Ag. What is the percent yield of silver in this reaction?
Cu + 2AgNO3 --> Cu(NO3)2 + 2Ag
Why is a gas easier to compress than a liquid or a solid?
The volume of a gas's particles is small compared to the overall volume of the gas.
Why does the pressure inside a container of gas increase if more gas is added to the container?
There is an increase in the number of collisions between particles and the walls of the container
Identify the limiting reagent and the volume of CO2 formed when 11L CS2 reacts with 18 L O2 to produce CO2 gas and SO2 gas at STP.
CS2(g) + 3O2(g) --> CO2(g) + 2SO2(g)
O2; 6.0 L CO2
How does the gas propellant move when an aerosol can is used?
from a region of high pressure to a region of lower pressure
If the volume of a container of gas is reduced, what will happen to the pressure inside the container?
the pressure will increase
If a balloon is squeezed, what happens to the pressure of the gas inside the balloon?
What happens to the temperature of a gas when it is compressed?
the temperature increases
As the temperature of the gas in a balloon decreases, which of the following occurs?
the average kinetic energy of the gas decreases
What happens to the pressure of a gas inside a container if the temperature of the gas decreases?
The pressure decreases
Why does air escape from a tire when the tire valve is opened?
the pressure outside the tire is lower than the pressure inside the tire
Which of these changes would NOT cause an increase in the pressure of a contained gas?
the volume of the container is increased
When the Kelvin temperature of an enclosed gas doubles, the particles of the gas
The volume of a gas is doubled while the temperature is held constant. How does the gas pressure change?
it is reduced by 1/2
The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change?
it increases by a factor of 8
when the temperature and umber of particles of a gas are constant, which of the following is also constant?
the product of the pressure and volume
If a balloon is heated, what happens to the volume of the air in the balloon if the pressure is constant?
When the pressure and number of particles of a gas are constant, which of the following is also constant?
the ratio of the volume and temperature in kelvins
If a balloon is heated, what happens to the pressure of the air inside the balloon is the volume remains constant?
When the volume and number of particles of a gas are constant, which of the following is also constant?
the ratio of the pressure sand temperature in kelvins
If a sealed syringe is plunged into cold water, in which direction will the syringe piston slide?
What happens when a piston is used to decrease the volume of a contained gas?
gas particles become compressed
If a sealed syringe is heated, in which direction will the syringe plunger move?
In general, for a gas at a constant volume,
the pressure of the gas is directly proportional to its temperature in kelvins
the combined gas law relates which of the following
temperature, pressure, and volume
What does the ideal gas law allow a scientist to calculate that the other gas laws do not?
number of moles
At a certain temperature and pressure, 0.20 mol of carbon dioxide has a volume of 3.1 L. A 3.1 L sample of hydrogen at the same temperature and pressure
contains the same number of molecules
How is the ideal gas law usually written?
PV = nRT/V
Which law can be used to calculate the number of moles of a contained gas?
ideal gas law
Which of the following is constant for 1 mole of any ideal gas?
At high pressures, how does the volume of a real gas compare with the volume of an ideal gas under the same conditions?
it is much greater
At low temperatures and pressures, how does the volume of a real gas compare with the volume of an ideal gas under the same conditions?
it is less
An ideal gas CANNOT be
Under what conditions of temperature and pressure is the behavior of real gases most like that of ideal gases?
low temperature and high pressure
If the atmospheric pressure on Mt. Everest is one-third the atmospheric pressure at seal level, the partial pressure of oxygen on Everest is
one-third its pressure at sea level
What happens to the partial pressure of oxygen in a sample of air if the temperature is increased?
If oxygen is removed from a sample of air as iron rusts, what happens to the partial pressure of oxygen in the air?
A box with a volume of 22.4 L contains 1.0 mol of nitrogen and 2.0 mol of hydrogen at 0C . Which of the following statements is true?
the partial pressure eof N2 is 101 kPa
If the volume of a container of air is reduced by one-half, what happens to the partial pressure of oxygen within the container?
it is doubled
which of the following gases will effuse the most rapidly?
Which of the following atoms would have the greatest velocity if each atom had the same kinetic energy?
If oxygen is removed from a sample of air as iron rusts, what happens to the total pressure in the air?
Which of the following gases is the best choice for inflating a balloon the trust remain inflated for a long period of time?
THIS SET IS OFTEN IN FOLDERS WITH...
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