CHEMISTRY EOC

The accepted value for the heat capacity for Al is 0.9 J/gC. Which group was both accurate and precise?

• 1
• 2
• 3
• 4

Class hypothesis: A chemical reaction will occur faster at higher temperatures. Students should do the following to reduce the bias in experimentation. 

• Students collaborate of experiment design.
• Teams of students repeat  procedures to confirm hypothesis.
• Students adjust data results to reflect original hypothesis.
• Students develop his or her own conclusion.

Energy demand and efficiency are critical factors in a building’s design. To minimize CO2 emissions, here are some things to consider. Which is NOT a sustainable practice?

• use renewable energy
• design it better
• carefully select materials
• use fossil fuels

Which statement is NOT true about the trend of ionization energy (IE)?

• He, Ne, and Ar have filled outer e- shells. (highIE) 
• Atoms with greater mass have greater gravitational force pulling on electrons. (highIE)
• The nuclear force increases across periods. (highIE)
• H, Li, Na, and K have unparied electrons in outer shell. (lowerIE)

Which pie graph best represents the ratio of metals, metalloids, and nonmetals of the periodic chart?

• 1
• 2
• 3
• 4

Which Lewis Dot structure best represents sulfur in ground state?

• A
• B
• C
• D

How many electrons are in a Lewis Dot structure of a neutral element with 12 total protons and 12 electrons. 

• 0
• 2
• 6
• 8

Which model is best depiction of 3s orbital of Magnesium?

• A
• B
• C
• D

Which particle spacing represents physical process that decreases in energy?

• A solid --> liquid
• B liquid --> gas
• C gas --> solid 
• D solid --> gas

According to the energy diagrams, this chemical reaction the process is ...

• endothemic, heat released
• endothermic, heat absorbed
• exothermic, heat released
• exothermic, heat absorbed