Chemistry Final Exam Review Fall 2024

Which of the following formulas represents an ionic compound?

• CS₂

• BaI₂

• N₂O₄

• PCl₃

Tags

NGSS.HS-PS1-3

Molecular compounds are usually _______________.

• composed of two or more transition elements

• composed of positive and negative ions

• composed of two or more nonmetallic elements

• exceptions to the law of definite proportions

In the chemical equation H₂O₂(aq) → H₂O(l) + O₂(g), the O₂ is a _________.

• catalyst

• solid

• product

• reactant

Tags

NGSS.HS-PS1-7

What are the coefficients that will balance the skeleton equation below?

AlCl₃ + NaOH → Al(OH)₃ + NaCl

• 1,3,1,3

• 3,1,3,1

• 1,1,1,3

• 1,3,3,1

Tags

NGSS.HS-PS1-7

The starting materials in a chemical reaction are called _______.

• products

• reactants

• starters

• enders

Tags

NGSS.HS-PS1-7

In every chemical reaction, __________________.

• mass and molecules are conserved

• moles and liters are conserved

• mass and atoms are conserved

• moles and molecules are conserved

Tags

NGSS.HS-PS1-7

In the reaction, 2CO(g) + O₂(g) → 2CO₂(g), what is the ratio of moles of oxygen used to moles of CO₂ produced?

• 1:1

• 2:1

• 1:2

• 2:2

Tags

NGSS.HS-PS1-7

Calculate the number of moles of Al₂O₃ that are produced when 0.60 mol of Fe is produced in the following reaction:

2Al(s) + 3FeO(s) → 3Fe(s) + Al₂O₃(s)

• 0.20 mol

• 0.40 mol

• 0.60 mol

• 0.90 mol

Tags

NGSS.HS-PS1-7

Iron(III) oxide is formed when iron combines with oxygen in the air. How many grams of Fe₂O₃ are formed when 16.7g of Fe reacts completely with oxygen? (Molar mass of Fe = 55.85 g/mol and Fe₂O₃ = 159.70 g/mol)

4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)

• 12.0 g

• 23.9 g

• 47.8 g

• 95.6 g

Tags

NGSS.HS-PS1-7

Which statement is true if 12 mol of CO and 12 mol of Fe₂O₃ are allowed to react?

3CO(g) + Fe₂O₃(s) → 2Fe(s) + 3CO₂(g)

• The limiting reagent is CO and 8.0 mol Fe will be formed.

• The limiting reagent is CO and 3.0 mol CO₂ will be formed.

• The limiting reagent is Fe₂O₃ and 24 mol Fe will be formed.

• The limiting reagent is Fe₂O₃ and 36 mol CO₂ will be formed.

Tags

NGSS.HS-PS1-7