The calculation of quantities in chemical reactions is a subject of chemistry called what?
What is stoichiometry?
100
2Cu(s) + S(s)--> Cu2S(s)
What is the limiting reagent when 80.0g Cu reacts with 25.0gS?
What is Copper?
100
How many MOLECULES of oxygen are produced when 29.2 g of water is decomposed?
2H20--> 2H2 + O2
What is 4.88 x 10^23 molecules of O2
100
The measure of the efficieny of a reaction performed in the laboratory is know as what?
What is percent yield?
100
Write the formula for nitrogen dioxide
What is NO2?
200
This is known as a conversion factor derived from the coefficients of a balanced chemical equation interpreted in terms of moles.
What is mole ratio?
200
What is the maximum number of grams of Cu2Sthat can be formed when 80.0g Cu reacts?
What is 1.00X10^2 g Cu2S?
200
CO2(g) + 2 LiOH(s) --> Li2CO3(aq) + H2O(l) How many grams of water would be produced by the reaction of 10 moles of CO2?
What is 180g?
200
The theoretical yield of a chemical reaction is 32.8g. The actual yield is 27.1g. What is the percent yield?
What is 1382.6%?
200
How many moles are in 47.8g KNO3?
What is 0.473 mol KNO3?
300
This is the reagent that determines the amount of product that can be formed by a reaction.
What is limiting reagent?
300
C2H4(g) + 3O2(g)--> 2CO2(g) + 2H2)(g)
If 2.70mol C2H4 is reacted with 6.30 mol O2, identify the limiting reagent.
What is O2?
300
How many moles of carbon are needed to react with 5.44 mol SO2
5C + 2SO2--> CS2 + 4CO
What is 0.54 mol
300
what is the percent yield if 13.1g CaO is actually produced when 24.8g CaCO3 is heated?
What is 94.2%
300
Names this ion PO4 charge 3-
What is phosphate ion?
400
The reactant that is not completely used up in a reaction is called the what?
What is excess reagent?
400
Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g) Identify the limiting reagent when 6.00g HCl reacts with 5.00g Mg.
What is HCl?
400
How many grams of hydrogen are necessary to react with 2.85mol CO?
CO +2H2--> CH3OH
What is 11.4g H2?
400
If 50.0g of silicon dioxide is heated with excess of carbon, 27.9g of silixon carbide is produced.
SiO2 + 3C -->SiC + 2CO
What is the percent yield?
What is 83.5%
400
Name this substance SiO2
What is Silicon Dioxide?
500
What is the formula for percent yield?
What is (Actual yield/Theoretical yield)x 100
500
In a reaction chamber, 3.0mol of aluminum is mixed with 5.3mol Cl2 and reacts. The reaction is described by the following balanced chemical equation.
2Al +3Cl2-->2AlCl3
What is the limiting reagent for the reaction?
What is Aluminum?
500
How many moles of nitrogen gas is needed to react with 44.8 liters of hydrogen gas to produce ammonia gas? 3H2 + N2 --> 2NH3
What is 0.667mol?
500
__Sb2S3 + __Fe--> 2Sb + 3FeS
When 15.0g Sb2S3 reacts with an excess of Fe, 9.84g Sb is produced. What is the percent yield of this reaction?
What is 91.5%
500
Write a net ionic equation for Ba(NO3)s (aq) + Na2SO4(aq)-->BaSO4(s) + NaNO3(aq)