Type of Reactions and Balancing

What type of reaction is the following reaction?

• Combination

• Decomposition

• Single-Replacement

• Double-Replacement

Is the following reaction balanced?

• Yes

• No

Tags

NGSS.MS-PS1-5

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

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-5

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

• 1

• 2

• 4

• 6

Tags

NGSS.MS-PS1-5

How many HCl molecules do you need to balance this equation?

2Mg + ​ (a)   HCl ---> 2MgCl₅ + 5H₂

• 10

• 1

• 2

• 5

Tags

NGSS.MS-PS1-5

Is this equation balanced?

H₃PO₄ + KOH --> K₃PO₄ + H₂O

• yes

• no

Tags

NGSS.MS-PS1-5

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

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

• 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.MS-PS1-5

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.MS-PS1-5

Identify the type of chemical reaction

• Synthesis

• Decomposition

• Single replacement

• Double replacement

• Combustion

Tags

NGSS.MS-PS1-2