Chemical Reactions Balancing

Is the following reaction balanced?

• Yes

• No

Tags

NGSS.HS-PS1-7

What number do I need to balance the following chemical reaction?

• 2

• 4

• 6

• 8

Tags

NGSS.HS-PS1-7

What number do I need to balance the following chemical equation?

• 1

• 2

• 4

• 6

Tags

NGSS.HS-PS1-7

What number will balance the following chemical reaction?

• 1

• 4

• 8

• 16

Tags

NGSS.HS-PS1-7

Which set of coefficients will correctly balance the following chemical reactions?

• 1,2,1,2

• 2,1,2,1

• 1,2,1,1

• 2,1,1,1

Tags

NGSS.HS-PS1-7

• 6

• 12

• 18

• 24

Answer explanation

To balance the reaction, we need 6 molecules of CO2 on the product side, so the correct coefficient for CO2 is 6.

Tags

NGSS.HS-PS1-7

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-7

What is the right ratio of chemicals for the balanced chemical equation?

__CO + __Fe₂O₃--> __Fe + __CO₂

• 3,1 --> 2,3

• 3,2 --> 1,1

• 3,2 --> 2,4

• 3,2 --> 2,1

Tags

NGSS.HS-PS1-7

Some students decomposed potassium chlorate powder into potassium chloride and oxygen gas. Which equation for this reaction is correctly balanced?

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-7

Balance this reaction: ____ AlBr₃ + ____ K₂SO₄ ---> ____ KBr + ____ Al₂(SO₄)₃

• 1,1,1,1

• 2,3,6,1

• 2,6,1,1

• 3,1,2,2

Tags

NGSS.HS-PS1-7