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Stoichiometry and Molar Calculations

Stoichiometry and Molar Calculations

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains the concept of limiting reactants in chemical reactions, using the synthesis of water as an example. It covers converting grams to moles, setting up a BCA table, and calculating the limiting reactant. The tutorial also demonstrates how to determine the mass of water produced and identify the excess reactant, providing a comprehensive understanding of these chemical concepts.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial mass of hydrogen used in the reaction?

20 grams

15 grams

10 grams

5 grams

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you convert grams to moles?

Subtract the molar mass

Multiply by the molar mass

Divide by the molar mass

Add the molar mass

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the starting amount of oxygen in moles?

0.625 moles

0.469 moles

0.313 moles

0.156 moles

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which reactant is the limiting reactant in this reaction?

Oxygen

Hydrogen

None

Water

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of the coefficients in the BCA table?

They determine the initial amounts

They are used to calculate the change in moles

They are used to find the molar mass

They are not used in the BCA table

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many moles of water are produced in the reaction?

0.625 moles

0.156 moles

0.313 moles

0.469 moles

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the molar mass of water (H2O)?

18.02 g/mol

22.02 g/mol

16.00 g/mol

20.00 g/mol

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