Chemical Reactions and Conservation of Matter

The law of conservation of matter states

• Matter cannot be created or destroyed.
• Matter can be created but not destroyed.
• Matter can be destroyed but not created.
• Matter can be transformed into energy.

Tags

NGSS.MS-PS1-5

Classify the equation CH₄ + 2O₂ → CO₂ + 2H₂O

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The compound before the arrow are called

• products
• catalysts
• byproducts
• reactants

The compounds after the arrow are the

• products
• catalysts
• intermediates
• reactants

Tags

NGSS.MS-PS1-5

The arrow in a chemical equation means

• The arrow represents a catalyst.
• The arrow means 'produces' or 'yields'.
• The arrow shows the direction of heat transfer.
• The arrow indicates a chemical bond.

Classify the following equation 2NH3 -- N2 + 3H2

Classify the following equation FE3O4 + 4H2 -- 3FE + 4H2O

Tags

NGSS.MS-PS1-2

Classify the following equation 4P + 5O2 -- 2P2O5

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Classify the following equation NaCl + H2O -- HCl + NaOH

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5