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Terms in this set (47)
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
the first step in most stoichiometry problems is to
convert given quantities to mole
In the reaction 2CO(g)+O2(g)-->2CO2(g) what is the raito of the moles of oxygen used to moles of CO2 produced?
which of the following is true about 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 g SO3
how many moles of aluminum are needed to react completely with 1.2 mol of FeO
. Calculate the number of moles of Al 2O3 that are produced when 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?
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)
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
Iron(III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe2O3 are formed when 16.7 g of Fe reacts completely with oxygen? 4Fe(s) + 3O2(g) --> 2Fe2O3(s)
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 45g 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?
2AL(s) + 3H2SO4 (aq) --> Al2 (SO4)3 (aq) + 3H2 (g)
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
how many grams of H3PO4 are produced when 10.0 moles of water react with an excess P4O10
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 true about the following reaction? 3NaHCO3(aq) + C6H8O7(aq) -> 3CO2(g) + 3H2O(s) + Na3C6H5O7(aq)
1 mole of water is produced for every mole of carbon dioxide produced
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 when 126 grams of glucose completely react with oxygen? C6H12O6 (s) + 6 O2 --> 6 CO2 (g) + 6 H2O (l)
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 x10^2 kg
which of the following is not true about limiting 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
how many grams of beryllium are needed to produce 36.0 g of hydrogen
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
which statement is true if 12 mol CO and 12 mol Fe2O3 are allowed to react?
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
50 molecules of O2
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
which of the following is the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form di phosphorus pentoxide?
P(s) + O2(g) -> P2O5(s)
What are the coefficients that will balance the skeleton equation below?
AlCl3 + NaOH -> Al(OH)3 + NaCl
what are the coefficients that will balance the skeleton equation below? N2 + H2 -> NH3
1, 3, 2
When the following is balanced, what is the coefficient for HCl? Mg + HCl -> MgCl + H2
what are the missing coefficients for the skeleton equation below? Al2(SO4)3 + KOH -> Al(OH)3 + K2SO4
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
Use the activity series of metals to complete a balanced chemical equation for the following single replacement reaction. Ag(s) + KNO3(aq) -->
No reaction takes place because silver is less reactive than potassium
if a total of 13.5 mol of NaHCO3 and 4.5 mol of C6H8O7 react, how many moles of Co2 and Na3C6H5O7 will be produced?
13.5 mol Co2 4.5 mol Na3C6H5O7
if 8.00 mol of NH3 reacted with 14.0 mol of O2, how many moles of H20 will be produced?
12 mol h2o
what is the mole ratio of d to a in the generic chemical reaction? 2A + B -> C + 3D
How many grams of CO are needed to react with excess Fe2O3 to produce 209.7 g Fe
if 5.0 g of H2 are reacted with excess CO, how many grams of CH3OH are produced, based on a yield of 86%
34 g CH3OH
solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. how many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water?
2Na + 2H2O -> 2NaOH + H2
6.38 x 10^23 molecules H2
the decomposition or potassium chlorite yields oxygen gas. if the yield is 95%, how many grams of KClO3 are needed to produce 10.0 L of O2
40 g KClO3
If O2 was the excess reagent, 8.3 mol of H2S were consumed, and 137.1 of water were collected after the reaction has gone to completion, what is the percent yield of the reaction?
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