lOMoARcPSD| 57911371
CHEMISTRY CUMULATIVE EXAM ACTUAL
QUESTIONS AND CORRECT ANSWERS VERIFIED
SOLUTIONS LATEST UPDATED
, lOMoARcPSD| 57911371
In which orbitals would the valence electrons for carbon (C) be placed? - s orbital and p
orbitals
What is the nuclear binding energy of an atom that has a mass defect of 1.643 10-28
kg?Use E = mc2. (Remember: The speed of light is approximately 3.00 108 m/s.) - 1.48
10-11 J
A teacher wants to perform a classroom demonstration that illustrates both chemical
and physical changes. Which would be the best demonstration that she could use? -
burning a candle
How does heat differ from temperature? - Temperature measures thermal energy, and
heat is the flow of thermal energy.
The enthalpy of formation of water is -285.8 kJ/mol. What can be inferred from this
statement? - Heat is released during the process.
Consider the reaction below.
2C6H14 + 19O2 12CO2 + 14H2O
How many moles of hexane (C6H14) must burn to form 18.4 mol of carbon dioxide? -
3.07 mol
Consider the following system at equilibrium.
CaCO3(s) Ca2+(aq) + CO32-(aq)
The addition of which compound will cause a shift in equilibrium because of a common
ion effect? - Na2CO3
Which postulate of the kinetic-molecular theory best describes the event in the
diagram? - All collisions between particles are perfectly elastic.
Consider the positions of barium (Ba), sulfur (S), silicon (Si), and calcium (Ca) on the
periodic table. The atoms of which element require the least amount of energy to give
up an electron when forming chemical bonds? - barium
Two cups of coffee, one that is at 10°C and one that is at 20°C, are mixed. Which
statement about the temperature of the mixture is correct? - Energy is transferred from
2 CHAPTER 1
)
CHEMISTRY CUMULATIVE EXAM ACTUAL
QUESTIONS AND CORRECT ANSWERS VERIFIED
SOLUTIONS LATEST UPDATED
, lOMoARcPSD| 57911371
In which orbitals would the valence electrons for carbon (C) be placed? - s orbital and p
orbitals
What is the nuclear binding energy of an atom that has a mass defect of 1.643 10-28
kg?Use E = mc2. (Remember: The speed of light is approximately 3.00 108 m/s.) - 1.48
10-11 J
A teacher wants to perform a classroom demonstration that illustrates both chemical
and physical changes. Which would be the best demonstration that she could use? -
burning a candle
How does heat differ from temperature? - Temperature measures thermal energy, and
heat is the flow of thermal energy.
The enthalpy of formation of water is -285.8 kJ/mol. What can be inferred from this
statement? - Heat is released during the process.
Consider the reaction below.
2C6H14 + 19O2 12CO2 + 14H2O
How many moles of hexane (C6H14) must burn to form 18.4 mol of carbon dioxide? -
3.07 mol
Consider the following system at equilibrium.
CaCO3(s) Ca2+(aq) + CO32-(aq)
The addition of which compound will cause a shift in equilibrium because of a common
ion effect? - Na2CO3
Which postulate of the kinetic-molecular theory best describes the event in the
diagram? - All collisions between particles are perfectly elastic.
Consider the positions of barium (Ba), sulfur (S), silicon (Si), and calcium (Ca) on the
periodic table. The atoms of which element require the least amount of energy to give
up an electron when forming chemical bonds? - barium
Two cups of coffee, one that is at 10°C and one that is at 20°C, are mixed. Which
statement about the temperature of the mixture is correct? - Energy is transferred from
2 CHAPTER 1
)
