Basic Chemical Reactions

Balance this equation
_N₂ + _H₂ --> _NH₃

• 1,2,3

• 1,3,2

• 1,1,2

• 2,1,1

Tags

NGSS.HS-PS1-7

___NaBr + ___Cl₂ ----> ___NaCl + ___Br₂

• 1,2,2,1

• 1,2,1,2

• 2,1,2,1

• 2,2,2,1

Tags

NGSS.HS-PS1-7

___C₂H₆O + ___O₂ ------> ___CO₂ + ___H₂O

• 1,3,2,3

• 1,2,2,1

• 2,2,1,3

• 2,2,3,1

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In an endothermic reaction the products have 

• more energy than the reactants

• less energy than the reactants

• the same energy as the reactants

• no energy

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4

In an exothermic reaction the products have

• more energy than the reactants

• the same energy as the reactants

• less energy than the reactants

• no energy

Tags

NGSS.HS-PS1-4

What is a substance called if it speeds up a chemical reaction?

• reusable

• catalyst

• specific

• fragile

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

• Enzymes increase the energy of the reactants.

• Enzymes decrease the energy level of the products.

• Enzyme decrease the activation energy of the reaction.

• Enzymes reverse the direction of the reaction.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-5

An enzyme speeds up a chemical reaction in the cell but can only be used once.  True or False? 

• true

• false

What is the function of an enzyme?

• enzymes break themselves into small pieces

• enzymes slow down chemical reactions

• enzymes speed up chemical reactions

• enzymes combine products to form reactants 

Which enzyme is most efficient in a basic solution?

• A

• B