Semester 2 Review!

The law of conservation of mass is relevant to balancing equations because

• It tells you the reactants and products must have the same amount of atoms of each element on both sides of the equation.

• It tells you that matter cannot be created or destroyed.

• It tells you that the reactants and products must have an equal number of each atom on both sides of the equation.

• All of the above

In the following molecule, which number represents the coefficient?

5 P₄O₁₀

• 5

• 4

• 10

• D. 60

What are the reactants in the following chemical equation?

NaCl + AgNO₃ --> AgCl + NaNO₃

• AgCl and NaNO₃

• NaCl and AgNO₃

• NaCl only

• AgCl only

What type of reaction is represented by the following: AB + CD → AD + CB?

• synthesis reaction

• decomposition reaction

• single replacement reaction

• double replacement reaction

Identify the type of reaction: NaCl --> Na + Cl₂

• Synthesis

• Combustion

• Decomposition

• Acid/Base

What are the correct coefficients to balance the following equation? _H₂ + _N₂ → NH₃

(do it on paper first)

• 3, 1, 2

• 1, 1, 2

• 2, 1, 3

• 2, 3, 2

What are the correct coefficients to balance the following equation? HCl + CaCO₃ → CaCl₂ + H₂CO₃

• 1, 2, 3, 1

• 3, 2, 3, 3

• 2, 1, 1, 2

• 2, 1, 1, 1

How many moles of NH₃ can be formed from 8 moles of N₂? 1 N₂ + 3 H₂ → 2 NH₃

• 10.50 mol NH₃

• 21.00 mol NH₃

• 4.67 mol NH₃

• 16.00 mol NH₃

Which of the following is the correct way to determine how many grams of HgO it would take to produce 25 grams of oxygen (O₂) using the following equation?

• 
• 
• 
• 

Based on the data , which of the following was the excess reactant?

• AgNO3

• Cu

• Ag

• Cu(NO3)2