Chem - Mod 8 Test

Identify the type of reaction of the following:
P₄ + 3 O₂ -> 2 P₂O₃

• Combustion/Synthesis
• Decomposition/Synthesis
• Double  Replacement
• Single Replacement

What does the symbol (s) mean?

• Solution
• Solid
• Liquid
• Gas

Tags

NGSS.MS-PS1-4

What is the definition of a catalyst?

• Something that speeds up a rxn
• Something that slows a rxn
• Something that makes more products
• Something that makes more reactants

Tags

NGSS.HS-PS1-5

What is an example of an inhibitor?

• lemon juice on fruit (slow down browning)
• digestive enzymes (speed up digestion)

Tags

NGSS.HS-PS1-5

The number in red is what?
2Mg + O₂ -> 2MgO

• Subscript
• Coefficient
• Mole ratio

A synthesis reaction happens when

• Two reactants form one product
• One reactant forms two products
• One element replaces another in a compound
• Two elements replace each other in a compound

True or false: Reactants are on the right side of the chemical equation

• False
• True

The formula for oxygen gas is

• O
• O₂
• O_{2 (g)}
• 2 O

Write the balanced skeleton equation for the following:

aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas.

• 2 AlBr₃ + 3 Cl₂ -> 2 AlCl₃ + 3 Br₂

• AlBr₃ + 3 Cl -> AlCl₃ + 3 Br

• AlBr + Cl -> AlCl + Br

• 2 AlBr + Cl₂ -> 2 AlCl + Br₂

Tags

NGSS.HS-PS1-7

Which of the following are evidence of a chemical change?

• Solid forms

• Bubbles from heating

• Color change

• Light produced

• Temperature change

Tags

NGSS.MS-PS1-2