Stoichiometry Pre Test

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

How many atoms of Hydrogen (H) are in C₆H₁₂O₆?

• 3

• 6

• 12

• 24

Tags

NGSS.HS-LS1-6

How many Chlorine (Cl) are in 6NaCl?

• 1

• 12

• 6

Tags

NGSS.MS-PS1-1

What is the first thing you must do to solve a stoichiometry problem?

• Make sure the chemical reaction is Balanced

• Panic

• Make sure the Equation is Unbalanced

• Multiple by Avogadro's Number

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

• Coefficient
• Subscript
• Atom
• Equation

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 
• Subscript
• Atom
• Equation

Balance this equation.
_CH₄ + _O₂ --> _CO₂ + _H₂O

• 1,2,1,1
• 2,1,2,1
• 1,2,1,2
• 0,2,0,2

What is the 2nd step in solving a stoichiometry problem?

• Make sure the chemical reaction is Balanced

• Convert newly calculated moles to grams

• Convert the grams or Liters of a substance given in the problem to moles of that substance

• Determine the mole ratio for the two substances being compared in the question

How many grams are in 12.6 moles of NaCl?

• 764 grams

• 724 grams

• 736 grams

• 637 grams