CH111 Final Exam Review - Fall 2023

Week 1

100

Ketchup is an example of a ________ mixture. 

homogenous 

200

The corrosion of the Statue of Liberty is an example of a ________ change.

chemical

300

A person going downhill on a bike is an example of ______ energy. 

kinetic 

400

Write 0.0000987 in scientific notation

9.87x10^-5

500

solve the following: (8.2x10⁷)/(2.1x10⁴)

3.9x10³

Week 2

100

How many milliliters are in 8.5L? 

8,500 mL

200

A dam contains 9.3 milligrams of impurity per gallon of water. How many micrograms of impurity are present per liter of water? (0.264gal=1L)

2455 micrograms/L or 2500 micrograms/L (sig figs) 

300

Calculate the density for a solution that has a mass of 7.2 grams and a volume of 56.2 mL. 

0.128 g/mL

400

Convert 35 degrees Celsius to Fahrenheit.

95 degrees Fahrenheit 

500

What is the name of group 8A on the periodic table? 

Noble gases 

Quantum Chemistry

100

write the electron configuration for carbon.

1s²2s²2p²

200

What element has the electron configuration of 1s²2s²2p⁶3s²3p²?

Silicon 

300

Write the electron configuration for selenium using the noble gas shorthand. 

[Ar]4s²3d¹⁰4p⁴

400

A photon of light has an energy of 1.34x10^-18 J. What is the wavelength of this light in nanometers? (h=6.63x10^-34J/s) (c=3.00x10⁸m/s) 

149 nm

500

What is the electron configuration for sodium? What are the inner electrons and outer electrons? 

1s²2s²2p⁶3s¹

all inner electrons except 3s¹

Naming Compounds

100

Name the compound: CuCl₂

Copper (II) chloride 

200

Write the formula for lead (IV) nitrite 

Pb(NO₂)₄

300

write the formula for diphosphorus tetroxide 

P₂O₄

400

Identify the compound as ionic or covalent and the name: NH₃​​​​

Covalent_, Ammonia 

500

Name the acid: HBr

hydrobromic acid 

Reactions

100

Balance the following equation: 

Fe₂O₃+C--->Fe+CO₂

2Fe₂O₃+3C--->4Fe+3CO₂

200

Classify the type of reaction: 

Zn+CuCl₂--->ZnCl₂+Cu

single replacement 

300

Name the element that is being oxidized and the element that is reduced:

Br₂+Cu--->CuBr₂

Cu is oxidized, Br is reduced  

400

Write the balanced combustion reaction for C₃H₈

C₃H₈+5O₂--->3CO₂+4H₂O

500

You expect to create 3.00 grams of a substance during a process and end up with a 54.3% yield. How many grams did you actually create?

1.63g

Molar Masses

100

Calculate the formula mass for C₂H₅O₃

77.06 u

200

How many moles of NH₃ are present in 78.2 gram sample? 

4.59 moles NH₃

300

What is the mass in grams of 5.23x10²³ nickel atoms? 

51.0 grams Ni

400

A manufacturer reacts 145.0 kilograms of carbon with excess fluorine gas. What mass of CF₄ is theoretically possible for this conversion? After the reaction is complete, the manufacturer isolates 565.2 kg of CF₂. What was the percent yield for this process? 

Theoretical: 603.6 kg

Percent yield: 93.64%

500

Identify the limiting and excess reactants given the following initial conditions: 

0.5 mol C₆H₆

4 mol O₂

2C₆H₆+15O₂----12CO₂+6H₂O

Limiting reactant: C₆H₆

excess reactant: O₂