Answer each question to the best of your ability. There is only one correct answer to each. Use the following charts to help you along your way. You may also use a calculator.
Answer each question to the best of your ability. There is only one correct answer to each. Use the following charts to help you along your way. You may also use a calculator.
Which of the following would have to lose two electrons in order to achieve a noble gas electron configuration?
O Sr Na Se Br
Elements from opposite sides of the periodic table tend to form _______________
What is the maximum number of double bonds that a hydrogen atom can form?
In the molecule below, which atom has the largest partial negative charge __________?
As you move to the right in the Periodic Table, electronegativity _______________, and as you go down the columns, it ________________.
Which of the following has eight valence electrons?
The type of compound that is most likely to contain a covalent bond is __________.
When the following equation is balanced, the coefficient of water is __________.
The balanced equation for the decomposition of sodium azide is __________.
How many moles of carbon dioxide are there in 52.06 g of carbon dioxide?
The combustion of propane (C3H8) produces CO2 and H2O:
C3H8 (g) + 5O2 (g) --> 3CO2 (g) + 4H2O (g)
The reaction of 2.5 mol of O2 will produce __________ mol of H2O.
C6H6 + Br2 --> C6H5Br + HBr
Which of the following changes will cause an increase in the forward rate of the above endothermic reaction
2CO + O2 --> 2CO2
If the above reaction takes place inside a sealed reaction chamber, then which of these procedures will cause a decrease in the rate of reaction?
A catalyst can speed up the rate of a given chemical reaction by
Which reaction diagram shows the effect of using the appropriate catalyst in a chemical reaction?
Which action will drive the reaction to the right?
In a sealed bottle that is half full of water, equilibrium will be reached when water molecules
When methane (CH4) gas is burned in the presence of oxygen, the following chemical reaction occurs.
CH4 + 2O2 --> CO2 + 2H2O
If 1 mole of methane reacts with 2 moles of oxygen, then
In the chemical reaction shown below, all of the HCl and Zn will react to form H2 and ZnCl2
Which of the following statements describes the result of this reaction?
Of four different laboratory solutions, the solution with the highest acidity has a pH of
A glass of cola was spilled on the carpet. Most colas are acidic with a pH usually between 2 and 4. Based on the pH shown above, which of the following substances could best be used to neutralize the spilled cola?
Sodium hydroxide (NaOH) is a strong base. The dissociation of NaOH in an aqueous solution is given below
NaOH(aq) --> Na+ (aq) + OH- (aq)
According to the Arrhenius theory, why is sodium hydroxide a base?
Which of these is an example of an exothermic chemical process?
When a steel block at 100oC is placed on top of a copper block at 20oC, the thermal energy of the copper begins to increase. Which of the following is the source of this increase in energy?
A container of cold water is dumped into a larger container of hot water. It is mixed and then left alone for a long time interval. The water temperature is found to
A popcorn kernel is up to 13% water. The drawing above shows a kernel of corn that is heated until it pops. Which of the following best explains what happens to the liquid water stored inside the kernel that leads to the popping process?
Which of the following statements best describes the energy transformation that occurs when a log burns?
The diagram shown represents a closed energy system. The system contains equal masses of air, copper, and water in a perfectly insulated container. The temperatures were taken at the time the materials were placed in the closed system.
How will the temperatures of the materials change over an extended period of time?
Water cools from 2oC to -2oC. During this time, what happens to the motion of the molecules?
Which of the following is an example of heat transfer by conduction?
Which of the following objects transfers its energy primarily by radiation?
Which of the following is the best example of heat transfer by convection?
A student touches a metal sink with her finger and notices that her finger feels cold. Which of the following statements explains this observation?
Which of the following has the lowest average molecular kinetic energy?
Which diagram represents the reaction diagram for an exothermic diagram?
When an exothermic reaction occurs in a water solution, the temperature of the solution
Which formula represents an ionic compound?
When ionic bonds are formed, metallic atoms tend to
A characteristic of ionic solids is that they
Which substance is a good conductor of electricity in both the solids and liquid phases?
A chemist performs the same tests on two homogeneous white crystalline solids, A and B. The results are shown in the accompanying table.
The results of these test suggest that
Which kind of energy is stored in a chemical bond?
Given the reaction:
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
Where solid zinc reacts with hydrochloric acid to produce zinc chloride and hydrogen gas, the reaction occur more slowly when a single piece of solid zinc is used instead of the same mass of powdered zinc. Why is this the case?
Given the system at equilibrium:
At constant temperature and pressure, an increase in the concentration of A will cause
The Haber reaction above is an exothermic process used to produce ammonia on a large scale. Which stress on the system at equilibrium favors the production of ammonia?
Given the above reaction, what is the ratio of moles of H2 consumed to moles of NH3 produced?
Given the balanced equation:
NaOH + HCl --> NaCl + H2O
What is the total number of grams of H2O produced when 115 grams of the product, NaCl, is formed?
What is the total mass of oxygen in 1.00 mole of Al2(CrO4)3?
Which factor is a major cause of global warming?
Which process helps global warming?
An increase in which gas would cause the most greenhouse warming of Earth's atmosphere?