How many valence electrons are in an atom of chlorine?
answer
7
question
How many valence electrons does aluminum have?
answer
3
question
Define Reaction Rate
answer
The decrease in concentration of reactants or the increase in concentration of products with time.
question
How does increasing temperature affect the rate of reaction?
answer
Increasing temperature causes the kinetic energy to increase. Thus, molecules are moving faster and colliding more frequently. This causes the rate of reaction to incrase.
question
If I decrease the concentration of reactant, what happens to the rate of reaction?
answer
Decreasing concentration leads to less reactants available for collision. Therefore, reaction rate decreases.
question
How does surface area influence reaction rate?
answer
By increasing the surface area of reactant molecules, we are increasing the space or point of contact that these molecules have available to interact. This causes an increase in the rate of reaction.
question
How does a catalyst speed up a chemical reaction?
answer
A catalyst speeds up a chemical reaction by finding an alternate pathway with a lower activation energy.
question
Define activation energy.
answer
The energy required to start a chemical reaction.
question
Define equilibrium.
answer
Equilibrium is established when the rate of the forward reaction is equal to the rate of the reverse reaction.
question
Is energy absorbed or released in an endothermic reaction?
answer
Absorbed.
question
What is the sign of delta H for an exothermic reaction?
answer
Exothermic reactions release energy. The sign of delta H is negative.
question
When you touch a flask and it feels hot, is this an endothermic or exothermic process?
answer
Exothermic; heat is being given off.
question
Define specific heat capacity.
answer
The amount of heat required to raise 1g of a substance to 1 degrees Celsius.
question
q=mc(delta)T ; What does "q" stand for?
answer
Heat (kJ)
question
q=mc(delta)T ; What does "c" stand for?
answer
Specific heat capacity (J / g degrees C)
question
What is a hydrogen ion donor called?
answer
An acid.
question
What is a hydrogen ion acceptor called?
answer
A base.
question
Feels slippery; acid or base?
answer
Base.
question
Tastes sour; acid or base?
answer
Acid.
question
Tastes bitter; acid or base?
answer
Base.
question
pH < 7 ; acid, base, or neutral?
answer
Acid
question
pH > 7 ; acid, base, or neutral?
answer
Base
question
Define neutralization.
answer
When an acid reacts with a base to form water and a salt. pH = 7.
question
Soap; acid or base?
answer
Base (tastes bitter)
question
Ammonia, acid or base?
answer
Base (drain cleaners are bases).
question
Lemonade; acid or base?
answer
Acid (tastes sour)
question
Define solute.
answer
The part of the solution in less amount.
question
Define solvent.
answer
The part of the solution in greater amount. (HINT: solvent is a bigger word than solute)
question
How many atoms are in 1 mole?
answer
1 mole = 6.02 x 10^23 atoms/molecules
question
What is the volume occupied by 1 mole of a gas at STP?
answer
1 mole of gas at STP = 22.4 L
question
Define STP.
answer
Pressure = 1 atm or 101.3 kPa
Temperature = 0 degrees Celsius or 273 K
question
What is the temperature at absolute zero?
answer
0 K (all molecular motion stops)
question
What causes gas pressure?
answer
Gas molecules are constant motion and collide with the walls of their containers and with the surfaces that they come into contact with. This collision causes pressure.
Mg + 2 HNO3 ---> Mg(NO3)2 + H2
If I start this reaction with 40.0 grams of magnesium and an excess of nitric acid (HNO3), how many grams of hydrogen gas will I produce?
answer
3.3 g H2
question
C2H4 + 3 O2 ----> 2 CO2 + 2 H2O
If you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced?
answer
141.4 g CO2
question
Balance the equation:
H2 + O2 -----> H20
answer
2 H2 + O2 ----> 2 H20
question
Balance the equation:
C3H8 + O2 ---> CO2 + H2O
answer
1 C3H8 + 3 O2 ---> 5 CO2 + 4 H2O
question
Find the molar mass of Al2(SO4)3
answer
342 g/mol
question
Which of the following has the greatest freedom of movement: solids, liquids, gases?
answer
Gases
question
Identify the following as a metal, semimetal, transition metal, or nonmetal:
H, C, K, Fe, Si
answer
H - nonmetal
C - nonmetal
K - metal
Fe - transition metal
Si - semimetal
question
Are noble gases reactive?
answer
NO! They have a full octet of electrons. They do not want to react with anything.
question
Given the reaction at equilibrium:
1/2 N2 (g) +1/2 O2 (g) + 21.6 kcal ---> NO (g)
What will happen if temperature is increased?
answer
Increasing temperature means heat is being added more to the left side (think mud slide). The reaction will shift right to form more NO.
question
Is fusion an endothermic or exothermic process?
answer
Endothermic (going from solid --> liquid). Think about phase change diagram.
question
Is condensation an endothermic or exothermic process?
answer
Going from gas ---> liquid. This is exothermic.
question
Is vaporization endothermic or exothermic?
answer
Going from liquid ---> gas. This is endothermic.
question
Is solidification endothermic or exothermic?
answer
Going from liquid ---> solid. This is exothermic.
question
Draw the Lewis Dot Structure for an atom of Neon in its ground state.
answer
..
: Ne :
..
question
Draw the Lewis Dot Structure for Carbon.
answer
.
. C .
.
question
Draw the Lewis Dot Structure for Fluorine.
answer
.
: F :
..
question
You have an acid that dissociates partially in solution. Is this a strong or weak acid?
answer
Weak acids dissociate partially. Strong acids and bases dissociate (break apart) completely in water.
question
Which of the following will not conduct electricity when dissolved in water: NaCl, NaOH, HCl, C6H12O6
answer
C6H12O6 is a sugar that is covalently bonded. It does not conduct electricity.
NaCl is a salt and an electrolyte (conducts electricity).
NaOH is a strong base and therefore, strong electrolyte.
HCl is a strong acid and strong electrolyte.
*All salts, acids, and bases will conduct electricity.
question
The monomers that make up proteins are what?
answer
Amino acids are the monomers.
Haven't found what you need?
Search for quizzes and test answers now
Quizzes.studymoose.com uses cookies. By continuing you agree to our cookie policy
