Stoichiometry Problem Solving Steps

Stoichiometry Problem Solving Steps

Assessment

Interactive Video

Chemistry, Science, Mathematics

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial covers stoichiometry, focusing on mole ratios and multi-step problems. It explains the three basic steps: converting given substances to moles, using mole ratios, and converting to requested units. Two examples are provided: one involving potassium and magnesium chloride, and another with copper II oxide decomposition. The tutorial emphasizes the importance of practice and offers support for students who need help.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in solving a stoichiometry problem after obtaining a balanced equation?

Calculate the mass of the desired substance

Convert to the requested units

Use a mole ratio

Convert the given substance to moles

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the reaction of potassium and magnesium chloride, what is the mole ratio of potassium to magnesium?

3:1

1:2

2:1

1:1

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When converting moles of magnesium to grams, which tool is used to find the molar mass?

Mole Ratio

Calculator

Periodic Table

Chemical Equation

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the decomposition of copper(II) oxide, what is the first step if you start with grams?

Convert moles to grams

Find the balanced equation

Use a mole ratio

Convert grams to moles

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of copper(II) oxide used in the example?

32.00 g/mol

63.55 g/mol

16.00 g/mol

79.55 g/mol

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the problem asks for grams of oxygen instead of moles, what additional step is needed?

Recalculate the mole ratio

Find a new balanced equation

Convert moles to grams

Use a different mole ratio

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of oxygen used when converting moles to grams?

64.00 g/mol

8.00 g/mol

32.00 g/mol

16.00 g/mol

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