CIHS Final Review-2

Consider the element with the electron configuration [Ne] 3s²3p⁵. This element is

• an actinide

• a transition metal

• a nonmetal

• a noble gas

• a halogen

Tags

NGSS.HS-PS1-1

Which of the following atoms should have the smallest atomic radius?

• Br

• Se

• Ga

• Ge

• As

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A mixture consisting of 0.140 mol N₂, 0.037 mol O₂, 0.104 mol CH₄, and an unknown amount of CO₂ occupies a volume of 8.48 L at 27°C and 1.06 atm pressure. How many moles of CO₂ are there in this sample?

• 0.719 moles

• 0.084 moles

• 2.45 moles

• 3.77 moles

• 0.364 moles

When the following equation is balanced with lowest whole-number coefficients, what is the coefficient in front of

O₂(g)? ___NH₃(g) + ___O₂(g) → ___NO(g) + ___H₂O(g)

• 4

• 7

• 2

• 1

• 5

Tags

NGSS.HS-PS1-7

When Pb(C₂H₃O₂)₂ and K₂SO₄ react, the products are _______.

• one strong electrolyte and one nonelectrolyte

• two strong electrolytes

• one strong electrolyte and one weak electrolyte

• two weak electrolytes

• one weak electrolyte and one nonelectrolyte

How many grams of the precipitate are formed when 25.0ml of 1.00M FeCl₃ reacts with 25.0ml of 1.50M AgNO₃ in this reaction? FeCl₃(aq) + 3AgNO₃(aq) → 3AgCl(s) + Fe(NO₃)₃(aq)

• 10.8g

• 3.6g

• 9.1g

• 5.4g

• 16.1g

Tags

NGSS.HS-PS1-7

Which of the following statements is true about the following reaction?

3CuO(s) + 2NH₃(aq) → N₂(g) + 3H₂O(l) + 3Cu(s)

• CuO(s) is the oxidizing agent and copper is reduced.

• CuO(s) is the oxidizing agent and copper is oxidized.

• CuO(s) is the reducing agent and copper is oxidized.

• CuO(s) is the reducing agent and copper is reduced.

• CuO(s) is the oxidizing agent and N₂(g) is the reducing agent.

When you allow neon to leak out of a 150ml container, it empties in 18.6 seconds. When you fill the same container (at the same temp and pressure) with an unknown, it empties in 40.9 seconds. What is the identity of the unknown?

• CHCl₃

• CH₂Cl₂

• CCl₄

• C₂H₃Cl

• C₂H₂Cl₂

You react Al with excess HCl according to the following reaction. If you collected 6.28L of hydrogen gas at 298K and 1 atm as products, what was the mass of Al used in the reaction?

2Al(s) + 6HCl(aq) → 2AlCl₃(aq) + 3H₂(g)

• 0.257g

• 4.61g

• 0.343g

• 6.91g

• 10.4g

What type of reaction is this? Cu(OH)₂ + Na₂SO₄ → 2NaOH + CuSO₄

• double replacement

• combustion

• single replacement

• redox

• decomposition