Chemical Reactions

Is this equation balanced?

• yes
• no
• Not enough information

Tags

NGSS.MS-PS1-5

Is this equation balanced?

• yes
• no
• Not enough information

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation
_Al +_HCl --> _H₂ +_AlCl₃

• 2, 6, 3, 2
• it is already balanced
• 4, 12, 3, 4
• 2, 1, 4, 5

Tags

NGSS.MS-PS1-5

Balance this equation-
__P₄ + __O₂ --> __P₂O₃

• it is already balanced
• 2, 1, 3
• 1, 2, 3
• 1, 3, 2

Tags

NGSS.MS-PS1-5

Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration
• surface area
• temperature
• reactants

Tags

NGSS.HS-PS1-5

Increasing the concentration increases the speed of reaction by

• lowering activation energy
• increasing collisions
• speeding up the reactants
• exposing more reactant

Tags

NGSS.HS-PS1-5

Which factors increase the rate of a reaction.

• increasing temperature

• increasing concentration

• decreasing surface area

• increasing volume (for gases)

Tags

NGSS.HS-PS1-5

A chemical Equation is

• The actual physical process of new substances forming
• The written story using symbols describing a reaction
• Neither of the above
• The Yield sign

What is the right part of a chemical equation called?
H_{2 +} O → H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

The Law of Conservation of Mass proves that -

• the number of atoms in a chemical reaction does not change
• there are more atoms on the reactant side than the product side
• there are more atoms on the product side than the reactant side
• the mass of the product will not equal the reactants

Tags

NGSS.MS-PS1-5