1
What is the empirical formula?
The smallest whole-number ratio of elements in a compound.
What is the theoretical yield?
Theoretical yield is the maximum amount of product the could be obtained from the given quantities of the reactants.
What is a limiting reactant?
The limiting reactant is the reactant that is completely used in the reaction or runs out first.
Balance this equation:
N2H4 + O2 > H2O +N
N2H4 + O2 > 2H2O + N2
Wright a balanced equation for this:
Silicon Dioxide reacts with carbon to produce the element silicon and carbon monoxide
SiO2 + 2C > Si + 2CO
Write a balanced equation for this reaction:
Ammonia (NH3) burns in oxygen to produce elemental nitrogen and water.
2NH3 + 3O2 > 2N + 3H2O
The actual yield of a reaction is 1.2g and the theoretical result is 1.3g. What is the percent yield?
92%
N2 + 3H2 > 2NH3
We want to produce 2.75 moles of NH3. How many moles of nitrogen would be required?
1.375 moles of nitrogen
2Sr + O2 > 2SrO
How many grams of SrO would be produced from 1.75 moles of Sr?
181.335 grams of SrO
How many moles of KCl are produced from 45 grams of K2S?
MgCl2 + K2S > MgS + 2KCl
0.82 moles of KCL
3AgNO3 + AlCl3 > 3AgCl + Al(NO3)3
Calculate the mass of AgCl that can be prepared from 200.0g of AlCl3 and sufficient AgNO3
645.01 grams of AgCl
CaCl2 + 2Ag > 2AgCl + Ca
If 90.97 g of Ca is produced, how many grams of AgCl will be produced?
650.622g AgCl
36.5 grams of calcium react with 18.2 grams of oxygen to produce calcium oxide.
2Ca + O2 > 2CaO
What is the limiting reactant?
Calcium
36.5 grams of calcium react with 18.2 grams of oxygen to produce calcium oxide.
2Ca + O2 > 2CaO
What is the amount of the other reactant that is in excess?
3.4 grams
36.5 grams of calcium react with 18.2 grams of oxygen to produce calcium oxide.
2Ca + O2 > 2CaO
What is the amount of calcium oxide that is produced?
51.1 grams
A compound consists of 72.2% magnesium and 27.8% nitrogen by mass. What is the empirical formula?
Mg3N2
Benzene has the formula C6H6. Calculate its percent composition.
C: 92% H: 8%
How many moles of magnesium sulfide is needed to react with 145g of sodium chloride?
1.24 mol MgSO4
Ethyne has the formula C2H2. Calculate its percent composition.
C: 92% H: 8%
The percent composition of eicosene is 85.63% C and 14.37% H. Its molecular mass is 280 u.
What is its empirical formula?
CH2
A compound is found to have 1.121 g of nitrogen, 0.161 g of hydrogen, 0.480 g of carbon, and 0.640 g of oxygen. The molar mass of the compound is 180.21 g/mol. What is the molecular formula?
H12N6C3O3
3.5 grams of iron (II) react with 13.0 grams of copper (I) nitrate.
What is the amount of copper produced?
6. 58 grams
3.5 grams of iron (II) react with 13.0 grams of copper (I) nitrate.
What is the amount of the reactant that is in excess?
0.61 grams
3.5 grams of iron (II) react with 13.0 grams of copper (I) nitrate.
What is the limiting reactant?
CuNO3
The percent composition of eicosene is 85.63% C and 14.37% H. Its molecular mass is 280 u.
What is its molecular formula?
C20H40