Stoichiometry / states of matter test review

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

What is an excess reactant?

• amount you end with

• what you run out of first

• what you have left over

• what you start with

What is a limiting reactant?

• the reactant that determines how much product can be made
• the reactant that is in excess
• the product that you can make the most of
• the amount of reactants that react with each other

Tags

NGSS.HS-PS1-5

When does a chemical reaction stop?

• When the lab is finished
• When the excess reactant is used up
• When the limiting reactant is used up
• Chemical reactions never stop

Tags

NGSS.HS-PS1-7

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.15%

• 1.04%

Tags

NGSS.HS-PS1-7

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

• 1.16%
• 116%
• 85%
• 76%

Tags

NGSS.HS-PS1-7

Which of the following is STP?

• 273 K and 2 atmospheres

• 0°C and 1 atmosphere

• 70°F and 1 atmosphere

• 20°C and 2 atmosphere

What is the proportion/ratio of 2 elements or compounds in a balanced chemical reaction?

• Stoichiometry

• Avogadro's Number

• Mole Ratio

• Theoretical Ratio

Tags

NGSS.HS-PS1-7

Which of the following is a comparison between the measured yield of a reaction, and the yield that was calculated?

• Actual Yield

• Percent Yield

• Theoretical Yield

• Percent Error

Which of the following is the measured yield of a reaction?

• Actual Yield

• Percent Yield

• Theoretical Yield

• Percent Error