Solution Stoichiometry

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

• Write a Balanced Equation

• Panic

• Write an Unbalanced Equation

• Ask for help

True or False. You must convert grams to moles to do stoichiometry.

• True

• False

Tags

NGSS.HS-PS1-7

If you predicted that 1.5 moles of Magnessium are used in a reaction, and you have 1.0 moles of Magnessium, what type of reactant is Magnessium?

• Limiting Reactant

• Excess Reactant

• Fast Reacter

• Non-Reactant

Concentration of 5dm3 dilute hydrochloric acid (number of moles of HCl is 0.5 mol)

• 0.01 mol/cm³

• 0.1 mol/cm³

• 2.5 mol/cm³

• 25 mol/cm³

Tags

NGSS.HS-PS1-5

What is the limiting reagent in this reaction?

• Mg

• HCl

• MgCl₂

• H₂

What is the percentage yield of this reaction?

• 60%

• 160%

• 100%

• 80%

Determine the value of x and y in the equation: Na₂CO₃ + xHCl --> yNaCl + CO₂ + H₂O

• x=1, y=2

• x=2, y=2

• x=2, y=1

• x=1, y=1

How many liters of ammonia are produced at STP if 80.28 grams of hydrogen gas are reacted in excess nitrogen gas?

• 5352 L NH₃

• 594.7 L NH₃

• 1.185 L NH₃

• 1198 L NH₃

Tags

NGSS.HS-PS1-7

Nitrogen gas is reacted with hydrogen gas to form ammonia (nitrogen trihydride). How many liters of nitrogen gas are needed to completely react 90.38 L of hydrogen gas at STP?

• 2022 L N₂

• 0.03323 L N₂

• 30.09 L N₂

A solution is made by dissolving 2.355 g of sulfuric acid in water. The total volume of the solution is 50.0 mL. What is the molar concentration of the sulfuric acid solution in mol acid/L soln.? (hint: don't forget to change mL to L)

• 2.08 M

• 0.480 M

• 0.833 M

• 4.80 x 10^-4 M