Mole Conversions
What is 6.022x10^23?
If 5.50 mol of CaC2 reacts with excess water, how many moles of C2H2 will be formed? Calcium hydroxide is also formed.
What is 5.50 mol of C2H2?
A.) The yield you obtain from an experiment or is told to you in a problem.
B.) The yield you must calculate on paper.
A.) What is actual yield?
B.) What is theoretical yield?
The reactant in which there are more moles than needed in a reaction.
What is excess reactant?
Solid dry ice gains kinetic energy to become carbon dioxide gas.
What is sublimation?
The mass of 1.25x102 mol of Ca(OH)2.
What is 9.26x103 grams?
When an antacid tablet dissolves in water, the fizz is due to a reaction between sodium hydrogen carbonate (NaHCO3) and citric acid (H3C6H5O7). Carbon dioxide, water, and Na3C6H5O7 are produced.
The moles of Na3C6H5O7 produced when 0.0119 mol of NaHCO3 is dissolved.
What is 0.00387 mol Na3C6H5O7?
Upon heating, calcium carbonate (CaCO3) decomposes to calcium oxide (CaO) and carbon dioxide (CO2).
The percent yield of carbon dioxide if 97.5 g were collected, and 235.0 g of calcium carbonate was used.
What is 94.7%?
Two moles of ethyne (C2H2) reacts with two moles of hydrogen gas to form one mole of ethane (C2H6).
A.) The limiting reactant.
B.) The excess reactant.
A.) What is hydrogen?
B.) What is ethyne?
A.) An IMF present between all molecules, increasing with the size of the molecule.
B.) An IMF present between molecules with H bound to N, O, or F.
C.) An IMF present between polar molecules.
A.) What are dispersion forces?
B.) What are H-bonds?
C.) What are dipole-dipole interactions?
The number of moles in 100.0 grams of dinitrogen oxide.
What is 2.27 mol?
Lead (IV) oxide reacts with H2SO4 in a car battery to form an electric current. Lead (II) sulfate and water form as a result.
This mass of lead (II) sulfate is produced when 25.0 g of lead reacts with excess lead (IV) oxide and sulfuric acid.
What is 73.2 g PbSO4?
Pure zirconium is obtained using the two-step Can Arkel process. In the first step, impure zirconium and iodine are heated to produce zirconium iodide (ZrI4). In the second step, zirconium iodide is decomposed to produce pure zirconium and iodine.
For the second step, determine the percent yield of zirconium if 45.0 g of ZrI4 is decomposed and 5.00 g of pure Zr is obtained
What is 73.0% yield Zr?
In 1901, Thomas Edison invented the nickel-iron battery. The following reaction takes place in the battery:
Fe(s) + 2 NiO(OH)(s) + 2 H2O(l) -> Fe(OH)2(s) + 2 Ni(OH)2(aq)
The moles of iron (II) oxide produced when 5.00 mol of iron and 8.00 mol of NiO(OH) react.
What is 4.0 mol Fe(OH)2?
(See phase diagram of water)
The process occurring at STP.
What is freezing/melting?
The number of representative particles in 4.45 mole of glucose.
What is 2.68x1024 molecules?
Carbon dioxide is a greenhouse gas that is linked to global warming. It is released into the atmosphere through the combustion of octane (C8H18) in gasoline.
The mass of octane needed to release 5.00 mol oxygen.
What is 71.4 grams octane?
Methanol (CH3OH), wood alcohol, is produced when carbon monoxide reacts with hydrogen gas.
The percent yield of methanol with 8.50 g of carbon monoxide is used, and 8.52 g of methanol is collected.
What is 87.7%?
Iron is obtained commercially by the reaction of hematite (Fe2O3) with carbon monoxide to form iron and carbon dioxide.
The grams of iron produced when 25.0 mol of hematite reacts with 30.0 mol of carbon monoxide.
What is 1120 g Fe?
Temperature only increases when the kinetic energy of molecules increase. The reason boiling water does not increase in temperature as heat is added.
The number of argon atoms inhaled when 0.600 grams of air is inhaled, and argon makes up 0.934% of air.
What is 8.44x1019 atoms?
The Russian Space Agency uses potassium superoxide (KO2) for the chemical oxygen generators in their space suits. Using four parts potassium superoxide, two parts water, four parts carbon dioxide, the Russians can produce four parts KHCO3, and three parts oxygen.
List out the exact recipe of all reactants in grams needed to produce 380 grams of oxygen gas. 50 points lost for each significant figure error!
What is....
1100 g KO2
140 g H2O
7.0x102 g CO2
Chlorine forms from the reaction of HCl with manganese (IV) oxide. Along with chlorine, manganese (II) chloride and water are formed as well.
The percent yield of chlorine if 86.0 g of manganese (IV) oxide and 50.0 g of HCl react. The actual yield of chlorine gas formed is 20.0 g.
What is 82.3%?
Lithium reacts spontaneously with bromine to produce lithium bromide.
The excess mass of the excess reactant when 25.0 g of lithium and 25.0 g of bromine react.
What is 22.8 g Li?
Rank the following compounds from lowest boiling point to highest boiling point:
C2H6, H2O, CH4, NH3
What is CH4 < C2H6 < NH3 < H2O?