Unit 5 Study guide: Moles & Stoichiometry

Given the balanced equation: 2KClO₃ → 2KCl + 3O₂ Which type of reaction is represented by this equation?

• synthesis

• decomposition

• single replacement

• double replacement

Which list includes three types of chemical reactions?

• condensation, double replacement, and sublimation

• condensation, solidification, and synthesis

• decomposition, double replacement, and synthesis

• decomposition, solidification, and sublimation

Identify the type of chemical reaction represented by this equation.

2H₂ + O₂ = 2H₂O

In which type of reaction do two or more substances combine to produce a single substance?

• synthesis

• decomposition

• single replacement

• double replacement

Which balanced equation represents a single-replacement reaction?

• Mg + 2AgNO₃ → Mg(NO₃)₂ + 2Ag

• 2Mg + O₂ → 2MgO

• MgCO₃ → MgO + CO₂

• MgCl₂ + 2AgNO₃ → 2AgCl + Mg(NO₃)₂

The molar mass of Ba(OH)₂ is

• 154.3 g

• 155.3 g

• 171.3 g

• 308.6 g

The gram molecular mass of Ca₃(PO₄)₂ is

• 246 g

• 279 g

• 310 g

• 342 g

Determine the molar mass of the product.

• 30 g/mol

• 18 g/mol

• 44 g/mol

• 60 g/mol

Tags

NGSS.HS-PS1-7

What is the gram-formula mass of Fe(NO₃)₃?

• 146 g/mol

• 194 g/mol

• 214 g/mol

• 242 g/mol

What is the number of moles of N₂(g) that contains 9.03 x 10²³ molecules?

• 0.667

• 1.50

• 33.6

• 42.0

Tags

NGSS.HS-PS1-7