Chemistry EOC Review

Which of the following isotopes has 18 neutrons?

• ⁴⁰Ar

• ³⁵Cl

• ¹⁸F

• ²⁴Mg

What is the correct name of Pb(CO₃)₂?

• Lead carbonate

• Lead (II) carbonate

• Lead (IV) carbonate

• Lead dicarbonate

What is the most likely result of nitrogen and chlorine reacting based on their dot diagrams?

• Three chlorine atoms will each steal one electron from nitrogen

• Five chlorine atoms will each steal one electron from nitrogen

• Three chlorine atoms will each share one electron with nitrogen

• Five chlorine atoms will each share one electron from nitrogen

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

N₂ + 3 H₂ -> 2 NH₃

Which of the following mole ratios is incorrect based on the balanced equation above?

• 2 mol NH₃

  3 mol H₂

• 1 mol N₂

  3 mol H₂

• 2 mol N₂

  6 mol H₂

• 2 mol NH₃

  4 mol N₂

Tags

NGSS.HS-PS1-7

As the number of protons increases across a period, while electrons are added to the same energy level, all of the following are true EXCEPT:

• the effective nuclear charge increases

• the electron shielding increases

• the atomic radius decreases

• the ionization energy increases

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Based on the reaction coordinate diagram, it can be concluded that:

• The reaction happens quickly

• The energy of the products is greater than the reactants

• The reaction is exothermic

• Energy is released when bonds are broken

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

Which letter is described incorrectly?

• Letter A – The activation energy for the reaction

• Letter B – The change in enthalpy (ΔH) for the reaction

• Letter C – The energy required to break reactant bonds

• Letter E – The energy released when product bonds form

Tags

NGSS.HS-PS1-4

According to the activity series, which of the following combinations of reactants will result in a single replacement reaction?

• I only

• II and III only

• II and IV only

• I and IV only

A 0.35 g sample of alcohol was combusted and all the energy was transferred to 950 g of water. The temperature of the water rose from 20.2°C to 22.8°C. Calculate the heat of combustion for alcohol in units of kJ/g alcohol . The specific heat capacity of water is 4.18 J/g∙C .

• –5.85 kJ/g alcohol

• –11.3 kJ/g alcohol

• –29.5 kJ/g alcohol

• –3610 kJ/g alcohol

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

According to the heating curve above, where energy is proportional to time, which line segment is described correctly as time increases?

• Line segment BC shows where the average kinetic energy of liquid is increasing

• Line segment DE shows where molecules gain potential energy to overcome intermolecular forces and become gas

• Line segment CD shows where molecules gain potential energy to increase the temperature of the liquid

• Line segment AB shows the melting of the solid at the melting point

Tags

NGSS.HS-PS3-2