May 4

A decomposition reaction can be represented as _____________________.

• AB  → A + B

• A + B → AB

• AB + CD → AC + BD

• A + BC → B + AC

A chemical change in which a single compound breaks down into two or more simpler products is called a ______________________.

• single-replacement reaction

• synthesis reaction

• double-replacement reaction

• decomposition reaction

This chemical equation for mercury oxide is an example of what type of reaction?
2HgO  → 2Hg + O₂

• decomposition reaction

• synthesis reaction

• combustion reaction

• Marvin the Martian reaction

A chemical change in which two or more substances react to form a new substance is a ____________________________.

• decomposition reaction

• synthesis reaction

• double displacement reaction

• combustion reaction

A synthesis reaction can be represented as ________________________.

• AB + CD → AC + BD

• AB → A + B

• A + B → AB

• A + BC → B + AC

Which of the following is an example of synthesis?

• Na + Br₂ --> NaBr

• KClO₃ --> KCl + O₂

• HgO + Cl₂-->HgCl + O₂

• Cl₂ + NaBr --> NaCl + Br₂

What is decomposition?

• putting substances together

• breaking substances apart

• element replacing another element in a compoud

• burning of a subtance

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

• Destroyed a little bit

• Invisible

• Transformed, changed

• None of the above

The number to the lower side of an element is a 

• Subscript

• Superscript

• Coefficient

• Charge

The number in front of a compound or element is a 

• Subscript

• Coefficient

• Superscript

• Charge