Periodic Table
Equilibrium
Energy
Chemical Reactions
Bonding
100
Atomic number of calcium (Ca)?
20
100
If Keq is less than 1, are reactants or products favored?
Reactants
100
Is this diagram represent an endothermic or exothermic reaction?
exothermic
100
What type of chemical reaction involves oxygen (O2) as a reactant?
Combustion
100
Intermolecular force shown here: Ne --- Ne
London dispersion
200
What type of element is chlorine (Cl)?
Halogen
200
What states of matter are NOT included in equilibrium problems?
Solid and liquid
200
Would energy be absorbed or released if an electron is moved from orbit 3 to 1?
Released
200
Identify one product of the double-replacement reaction: AlCl3 + NaF -->
NaCl or AlF3
200
Ionic compound formula between Na and P?
Na3P
300
Which element is larger: Beryllium (Be) or magnesium (Mg)?
Magnesium (Mg)
300
Keq set-up for A(g) <-> 2 B(g)?
Keq = [B]2/[A]
300
If you touch an exothermic reaction, does it feel hot or cold?
Hot
300
Balance the following reaction. N2 + H2 --> NH3
N2 + 3 H2 --> 2 NH3
300
Intermolecular force between polar particles containing hydrogen?
Hydrogen bond
400
How many valence electrons does oxygen (O) have?
6
400
In the endothermic reaction A(g) <-> B(g), which way would it shift at equilibrium if you increase the temperature?
Towards products
400
Three substances with equal mass are given the same amount of heat energy. Substance A changes temp by 7 degrees, substance B changes by 5 degrees, and substance C changes by 10 degrees. Which has the lowest specific heat capacity?
Substance C
400
What are the two products of a combustion reaction of a hydrocarbon?
CO2 and H2O
400
Type of bond formed when electrons are transferred between Na and Cl?
Ionic
500
What is the mass number of 4019K+?
40
500
In the reaction 2 A(g) <-> B(g), which way would it shift at equilibrium if you decrease the volume?
Towards products
500
Calculate the heat absorbed by aluminum if 10 grams changes temperature from 5 Celsius to 10 Celsius. C = 0.9 J/gC
Q = m x C x change T
45 Joules
500
What are three factors that affect the speed of a reaction?
Concentration, temperature, surface area, catalysts
500
Which of the following elements is the most electronegative: lithium (Li) or fluoride (F)?
Fluoride (F)