#1 Chemical Reactions Test Review

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Which of these is not a chemical reaction?

• Burning of wood
• Milk going bad
• Mixing vinegar and baking soda
• Melting of ice

If reaction starts with 20g of reactants it should produce 

• a total of 40g of products
• a total of 10g of products
• a total of 80 g of products
• a total of 20g of products

Substances that form as the result of a chemical reaction

• products
• reactants
• coefficients
• subscripts

Substances present at the start of a chemical reaction

• subscripts
• coefficients
• reactants
• products

• 2

• 3

• 5

• 6

Does the image correctly represent the Law of Conservation of Mass?

• yes

• no

Does the image represent the Law of Conservation of Mass

• yes

• no

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Which of these is not a chemical reaction?

• Burning of wood
• Milk going bad
• Mixing vinegar and baking soda
• Melting of ice