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Stoichiometry Practice and Limiting Reactant

Authored by Lisa Thompson

Science

11th Grade

NGSS covered

Stoichiometry Practice and Limiting Reactant
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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The limiting reactant

.
is used up first
is the reactant that is left over
.

Tags

NGSS.HS-PS1-7

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When the limiting reactant is used up, what happens?

the reaction speeds up

the reaction slows down

the reaction moves to its 2nd stage

the reaction stops

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What are the correct steps for determining the limiting reactant?

divide each reactant by its molar mass and look for the smallest number

balance the chemical equation and look for the smallest coefficient

divide the moles of each reactant by its coefficient and look for the smallest number

divide each reactant by Avogadro's number and look for the smallest number

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

When does a reaction stop?

When it wants to

When both the limiting and excess reactants are gone

When all the excess reactant has been consumed

When all the limiting reactant has been consumed

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which reactant is the limiting reagent and why?

Hydrogen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.

Oxygen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.

Tags

NGSS.HS-PS1-7

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Which reactant is the limiting reagent and why?

Hydrogen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.

Oxygen is the limiting reagent because two moles of hydrogen is required for every one mole of oxygen to produce two water.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the limiting reactant if 10 moles of NH3  react  with 30.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2O

NH3

NO

N2

water

Tags

NGSS.HS-PS1-7

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