Stoichiometry, Mole Ratio Bellringer

Multiple Choice

_____________ is the study of quantitative relationships between reactants used and products formed.

• proportion

• mole ratio

• chemistry

• stoichiometry

Multiple Choice

What is the ratio of red to blue marbles?

• 2:6

• 4:6

• 2:4

• 2:2

Multiple Choice

Which is NOT a correct way to write a proportion?

• 1 : 2

• 1 to 2

• 1/2

• 1(2)

Multiple Choice

When looking at a chemical equation, what tells you the mole ratios?

• the subscripts (small numbers at the bottom)

• the element symbols

• the coefficients

• 15.0

Multiple Choice

H₂+Cl₂-->2HCl

What is the mole ratio of H₂ to HCl?

• 1 : 1

• 2 : 1

• 1 : 2

Multiple Choice

N₂ + 3H₂ --> 2NH₃

What is the mole ratio of N₂ to NH₃

• 1:2

• 2:2

• 3:2

• 1:2

Multiple Choice

2Na + S -->Na₂S
What is the total number of moles of Na₂S produced when 8.0 moles of Na were completely consumed?

• 1

• 2

• 0.5

• 4

Multiple Choice

N₂ + 3H₂ --> 2NH₃
How many moles of N₂ is needed to react with 6 moles of H₂?

• 6.7
• 2.0
• 3.0
• 15.0