Chemistry Solutions

Identify this type of reaction: 
Al (s) + HCl (aq) → AlCl₃ (aq) + H₂ (g)

• Precipitation
• Synthesis
• Combustion
• Single Replacement

The Law of Conservation of Mass states that the total mass of the reactants should be

• More than the mass of the products

• Equal to the mass of the products

• Ignored during the reaction

• Less than the mass of the products

Tags

NGSS.HS-PS1-7

Which of the following reactions involves the ions of two compounds exchanging places to form two new compounds?

• Synthesis

• Double Displacement

• Combustion

• Single Displacement

When balancing equations, the rule is that you can only add, change, and remove ____________

• Coefficients

• Mass

• Subscripts

• Elements

The formation of water is an example of a ________ reaction because two simple substances (H and O) combine to produce a new compound (H₂O).

• Single Displacement
• Decomposition
• Double Replacement
• Synthesis

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The following reaction is an example of what reaction type? 
CoCO₃ → CoO + CO₂

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

Combustion reactions will always involve

• Oxygen and a solid

• Liquid nitrogen and heat

• Oxygen and heat/energy

• CO and H₂O

Which of the following is an example of synthesis?

• Na + Br₂ --> NaBr
• KClO₃ --> KCl + O₂
• HgO + Cl₂-->HgCl + O₂
• Cl₂ + NaBr --> NaCl + Br₂

Which of the following is an example of decomposition?

• Na + Br₂ --> NaBr
• KClO₃ --> KCl + O₂
• HgO + Cl₂-->HgCl + O₂
• Cl₂ + NaBr --> NaCl + Br₂

What is the correct name for Al(NO₃)₃?

• Aluminum nitrate

• Aluminum(III) nitrate

• Aluminum nitrite

• Aluminum nitrogen trioxide