Chemical equations

Which type of chemical reaction has the following configuration?

Hydrocarbon + Oxygen --> Carbon Dioxide + Water

C_xH_y + O₂ --> CO₂ + H₂O

• Neutralization

• Oxidation of a metal

• Combustion

Select each compound that can be produced by combustion reactions. (pick 2)

• Oxygen

• Carbon Dioxide

• Water

• Carbon

In the equation,          2Mg + O₂ ---> 2MgO, which are the reactants?

• Mg and O
• MgO
• Mg and MgO
• O and MgO

What coefficients are needed to correctly balance the equation?
_Bi   +   _O₂   >   _Bi₂O₃

• 3,2,3
• 2,3,2
• 4,3,2

Tags

NGSS.HS-PS1-7

Why must chemical equations be balanced?

• So that the equation doesn't explode

• The reaction won't happen until it is balanced

• Based on the Law of Conservation of Matter, matter cannot be created or destroyed.

• Based on the Law of Conservation of Energy, energy cannot be created or destroyed.e

Tags

NGSS.HS-PS1-7

The right side of the equation below is called the

• products
• reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following answers will balance the equation below?
__K + __Br₂ --> __KBr

• 2, 1, 1
• 2, 3, 2
• 2, 1, 2
• 1, 2, 3

Tags

NGSS.HS-PS1-7

What type of chemical reaction is this one?
C₂H₂ + O₂ --> CO₂ + H₂O

• Acid-base neautralization

• Combustion
• Acid with a metal

Which of the following models best demonstrates a balanced chemical equation?

• F

• G

• H

• J

Tags

NGSS.HS-PS1-7

Why must chemical equations be balanced?

• So that the equation doesn't explode

• The reaction won't happen until it is balanced

• Based on the Law of Conservation of Matter, matter cannot be created or destroyed.

• Based on the Law of Conservation of Energy, energy cannot be created or destroyed.

Tags

NGSS.HS-PS1-7