Unit 5 Mini Practice Test

(5B) Given the unbalanced equation:

Al₂(SO₄)₃ + Ca(OH)₂ $$\rightarrow$$ Al(OH)₃ + CaSO₄

What is the coefficient in front of the CaSO₄ when the equation is completely balanced with the smallest whole-number coefficients?

(5B) Answer the question that follows using the chemical equation below:

C₂H₄ + O₂ $$\rightarrow$$ CO₂ + H₂O

When the equation is completely balanced using the smallest whole numbers, the coefficient of O₂ would be

(5B) When the equation

NH₃ + O₂ $$\rightarrow$$ N₂ + H₂O

is completely balanced using the smallest whole numbers, the coefficient of the O₂ will be

(5F) Given the balanced equation:

CaCO₃(s) + 2HCl(aq) CaCl₂(aq) + H₂O(l) + CO₂(g)

What is the total number of moles of CO₂ formed when 20. moles of HCl is completely consumed?

(5F) Given the balanced equation:

2C₄H₁₀(g) + 13O₂(g) → 8CO₂(g) + 10H₂O(g)

What is the total number of moles of O₂(g) that must react completely with 5.00 moles of C₄H₁₀(g)?

(5G) What is the empirical formula of this compound?

(5G) Which pair of compounds has the same empirical formula?

(5G) What is the molecular formula of a compound that has a molecular mass of 42 g/mol and an empirical formula of CH₂?

(5A) Which equation represents a single replacement reaction?