Chemical Reactions Test

What part of the equation does the (1) represent?

• product

• produces/yields

• solid

• reactant

Number seven (7) is indicating ____ of the equation.

• reactants

• products

• equation

• formulas

What is the symbolic representation of a chemical reaction in the form of symbols and formulas?

• chemical change

• chemical equation

• chemical reaction

• Law of Conservation of Mass

If a reaction starts with 25g of NaCl it can have which of the following as its products?

• 10 g of Na and 20 g of Cl₂

• a total of 10g of products
• 10 g of Na and 15 g of Cl₂

• 20 g of Na and 10 g of Cl₂

When balancing chemical equations, you can only change what?

• subscripts

• formulas

• coefficients

• products

__H₂ + __O₂ --> __H₂O

What coefficients will balance the equation?

• 2,1,2

• 1,1,2

• 1,1,1

• 2,2,2

AlBr₃ + __K₂SO₄ --> KBr + Al₂(SO₄)₃

What is the coefficient of K₂SO₄ in the balanced equation?

• 1

• 2

• 3

• 4

S₈ + __O₂ --> SO₃

What is the coefficient for O₂ in the balanced equation?

• 6

• 8

• 12

• 24

KClO₃ --> KCl + O₂

What are the coefficients for the balanced equation?

• 2,1,3

• 2,1,1

• 2,2,3

• 1,1,3

The following is what type of reaction:
PbCl₂ + AgNO₃ → Pb(NO₃)₂ + AgCl

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement