Unit 6: Chemical Reactions Test

Each substance to the right of the arrow in a chemical equation is a(n) ______.

• Catalyst
• Product
• Reactant
• Inhibitor

The number that go before symbols and formula in a chemical equation are ______.

• Subscripts
• Superscripts
• Catalysts
• Coefficients

Substance that speed up chemical reactions are called ___________.

• Catalystss
• Products
• Reactants
• Inhibitors

What mass of hydrogen (H2) was produced in the reaction below?

• 2 g
• 4 g
• 135 g
• 72 g

When objects are burned a __________ reaction has occurred.

• double replacement
• single replacement
• combustion
• synthesis

The burning of wood in a campfire that produces heat and light would be both an _____ and an ________.

• exergonic; exothermic
• exergonic; endothermic
• endergonic; endothermic
• endergonic; exothermic

Brad and Julian conducted several tests to determine the properties of silver metal. They noted that it was white, and conducted both electricity and heat. They computed the density to be 10.49 g/cm3. Silver did not react with water but in nitric acid, it released a gas. What evidence above supports a chemical change in silver?

• Silver conducts electricity
• Silver reacts with nitric acid to produce a gas
• The color of silver at room temperature is white
• Silver conducted heat.

In a chemical equation, the symbol that means dissolved in water is _______.

• (s)
• (l)
• (g)
• (aq)

What type of reaction is the following chemical reaction: CH3CH2OH + 3 O2 --> 2 CO2 + 3 H20

• Double replacement
• Single replacement
• Combustion
• Synthesis

Which chemical reaction represents a double replacement reaction

• 2 Na + Cl2 --> 2NaCl
• 2 KClO3 --> 2KCl + 3 O2
• NaOH + HCl --> NaCl + H20
• Zn + 2 HCl --> ZnCl2 + H2