Balancing Equations and Molar Conversions

The coefficient in 3H₂O is

• 6

• 5

• 2

• 3

Tags

NGSS.HS-PS1-7

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

Tags

NGSS.HS-LS1-6

Balance this equation

_Al +_HCl --> _H₂ +_AlCl₃

• 2,6,3,2

• it's already balanced

• 4,12,3,4

• 2,1,4,5

Tags

NGSS.HS-PS1-7

What is the number before a chemical formula called?
Ex: 2H₂ + O₂ --> 2H₂O

• Coefficient
• Subscript
• Atom
• Equation

Balance this equation
_N₂ + _H₂ --> _NH₃

• 1,2,3
• 1,3,2
• 1,1,2
• 2,1,1

Tags

NGSS.MS-PS1-5

Balance this equation.
_CF₄ + _Br₂ -- _CBr₄ + _F₂

• 2,1,2,1
• 1,2,2,1
• 1,2,1,2
• 2,2,2,2

What are the coefficient used to balance the equation below?
__Ag₂O →__ Ag +___O₂

• 2,4,1
• 1,1,1
• 2,1,2
• 2,2,2

Tags

NGSS.HS-PS1-7

What is the molar mass of water (H2O)?

• 16.0 g/mol

• 22.9 g/mol

• 20.0 g/mol

• 18.0 g/mol

What is the molar mass of calcium chloride (CaCl2)?

• 56.4 g/mol

• 79.0 g/mol

• 111.0 g/mol

• 90.3 g/mol

How many moles are in 25 grams of sodium (Na)?

• 2.5 moles

• 1.08 moles

• 0.5 moles

• 0.25 moles