College Chemistry FInal Exam Practice Part 2

Complete the following conversions between SI units.

4102 μg --> _____ g

Be sure to type your answer in Sci. Notation.

Mathematical Equivalence

ON

Which of the following represents the least number of molecules?

• 40.0 g H₂0 (18.02 g/mol)

• 144.0 g CH₄ (16.06 g/mol)

• 136.0 g CaH₂ (42.09 g/mol)

• 200.0 g N₂O (44.02 g/mol)

• 168.0 g HF (20.01 g/mol)

A certain fruity; loopy cereal contains 21.0 grams of sugar (sucrose, C₁₂H₂₂O₁₁: MM = 342.301 g/mol) per serving size of 90.0 grams. How many servings of this cereal must be eaten to consume 0.0365 moles of sugar

Mathematical Equivalence

ON

Using the periodic table, classify each of the following elements as the most specific type of metal or a nonmetal:

• Halogen

• Barium

• Actinide

• Palladium

• Transition Metal

• Iodine

• Chalcogen

• Selenium

• Alkaline Earth Metal

• Thorium

Tags

NGSS.HS-PS1-1

Using the periodic table, identify the most electronegative member of the following group; Pnictogens: (a)  

• N
• P
• As
• Sb
• Bi

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Using the periodic table, identify the lightest member of the following group; Metalloids: ​ (a)  

• Si
• As
• Sb
• B
• Te
• Po

Tags

NGSS.HS-PS1-1

Using the Bohr model, determine the energy in joules of the photon produced when an electron in a He⁺ ion moves from the orbit with n = 5 to the orbit with n = 2.

Rydberg Equation

Mathematical Equivalence

ON

Heated lithium atoms emit photons of light with an energy of 2.961 × 10⁻¹⁹ J. Calculate the wavelength in meters of one of these photons.

Mathematical Equivalence

ON

Tags

NGSS.HS-PS4-1

Heated lithium atoms emit photons of light with an energy of 2.961 × 10⁻¹⁹ J. What is the total energy in 1 mole of these photons?

Mathematical Equivalence

ON

Tags

NGSS.HS-PS3-1

Determine the oxidation states of the elements in the following compounds:

a) FeCl₃ ---> Fe​ (a)   Cl​ (b)  

b) KNO₃ ---> K ​ (c)   N​ (d)   O ​ (e)  

• +3
• -1
• +1
• +5
• -2