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Unit 7 Review - Moles & Stoichiometry

Authored by Ashley Nelon

Chemistry

10th Grade

NGSS covered

Used 3+ times

Unit 7 Review - Moles & Stoichiometry
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30 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Stoichiometry is -

a balanced reaction with the same number of elements on both sides of the reaction

Calculating moles

using the balanced reaction and moles to calculate amounts needed and used

percentage yield

Tags

NGSS.HS-PS1-7

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

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

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the theoretical yield?

the maximum amount of product from a reaction
the amount of product recovered from a lab experiment
amount of product that causes the reaction to stop
the amount of product needed to reverse the reaction

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich.  If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?

bread
jelly
peanut butter
sandwich

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

In the lab, a scientist calculated that he should produce 12.3 grams of product in his experiment. When he is finished collecting the product it weighs 10.1 grams. What is his percent yield?

82%

0.82%

10.1 %

100%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The type of stoichiometry problem that involves the most steps is a 

mass-to-mole conversion
mole-to-mass conversion
mass-to-mass conversion
mole-to-mole conversion

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