Balancing Reactions

Is the following reaction balanced?

 $H_2\ +\ O_2\ \longrightarrow\ H_2O$  

• Yes

• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is the following reaction balanced?

 $2KClO_{3\ }\longrightarrow\ 2KCl\ +\ 3O_2$  

• Yes

• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is the following reaction balanced?

 $10P\ +\ 4O_{2\ }\longrightarrow\ 2P_2O_5$  

• Yes

• No

Tags

NGSS.MS-PS1-5

Which number is needed to balance the following equation?

 $2K\ +\ MgBr_2\ \longrightarrow\ \ldots KBr\ +\ Mg$  

• 3

• 1

• 2

• 4

Tags

NGSS.MS-PS1-5

Which number is needed to balance the following equation?

 $2Na\ +\ 2H_2O\ \longrightarrow\ 2NaOH\ +\ldots H_2$  

• 2

• 1

• 3

• 4

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

_________ can be neither created nor destroyed.

Tags

NGSS.MS-PS1-5

True or false:

In any physical change or chemical reaction, mass is conserved.

• True

• False

Tags

NGSS.MS-PS1-5