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WorksheetsFinal S2
Total questions: 10
Worksheet time: 5mins
Why must equations be balanced?
Conservation of matter
To make explosions
To make chemical reactions
All of the above
Which of the following are signs of a chemical reaction?
Bubbling/gas
Heat
Color change
Precipitation
All of the above
What do reactions need in order to begin?
Products
Photosynthesis
Activation energy
A catalyst
What is the molar mass of NaCl?
87
35
47.5
58.44
What is the molar mass of NO3?
43.5
62.01
58.44
63.7
Which of the following are types of radiation?
Infrared
UV
Visible light
All of the above
What do greenhouses do?
Release green gases
Absorb infrared radiation
Help the environment
None of the above
What factors increase a chemical reaction?
Catalyst
surface are
Temperature
Reactants
All of the above
Which of the following allow reactions to occur?
Collision
Energy
Direction
All of the above
As products increase reactants decrease
True
False
