Balancing Equations

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

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Is the following equation balanced?
4Fe + 3O₂ --> 2Fe₂O₃

• yes

• no

Tags

NGSS.MS-PS1-5

• element
• compound
• mixture of elements
• mixture of compounds

Tags

NGSS.MS-PS1-1

What is the correct term for a substance made up of two or more elements that are chemically bonded together?

• A) element

• B) compound

• C) mixture of elements and compounds

• D) mixture of compounds

Tags

NGSS.MS-PS1-1

The numbers placed in ​ (a)   of formulas to balance equations are called ​ (b)   , and they multiply all the atoms in a ​ (c)   . Thus, the symbol “2NaHCO₃” indicates ​ (d)   units of sodium bicarbonate, which contain 2 Na atoms, 2 H atoms, 2 C atoms, and 6 O atoms

(2 X 3= 6, the coefficient times the subscript for O).

• front

• coefficients

• two

• formula

• element
• compound
• mixture of elements
• mixture of compounds and elements

Tags

NGSS.MS-PS1-1

• element
• compound
• mixture of elements and compounds
• mixture of compounds

Tags

NGSS.MS-PS1-1

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes

• No

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?

• 2,1 --> 2,1

• 1,2 --> 1,1

• 1,2 --> 2,4

• 1,2 --> 2,1

Tags

NGSS.MS-PS1-5