Stoichiometric Calculations Quiz (P)

Questions and Answers

What is the correct way to write the molar mass of iron oxide as a conversion factor?

159.7 g Fe2O3 / 1 mol Fe2O3

A total of 2 mol iron oxide has a mass of?

2.00 g

319.4 g (correct)

159.7 g

79.85 g

What is the correct way to write the inverted molar mass of aluminum oxide as a conversion factor?

1 mol Al2O3 / 102.0 g Al2O3

As the mass of a sample increases, the number of moles present in the sample?

increases Signup and view all the answers

What is the mass of 1.84 mol NaCl?

108 g NaCl Signup and view all the answers

What is the correct setup for calculating the mass of NaCl?

1.84 x (58.44 g NaCl / 1 mol NaCl) = 108 g Signup and view all the answers

What mass of water forms when 1.45 × 10^-3 g O2 reacts completely?

1.63 × 10^-3 g Signup and view all the answers

What mass of glucose (C6H12O6) can form from 71.89 g CO2?

49.05 g C6H12O6 Signup and view all the answers

What mass of oxygen forms from 71.89 g CO2?

52.27 g O2 Signup and view all the answers

What mass of water is required to react completely with 157.35 g CO2?

64.43 g H2O Signup and view all the answers

What mass of oxygen (O2) forms in a reaction that forms 15.90 g C6H12O6?

16.94 g O2 Signup and view all the answers

What mass of water forms when 2.75 × 10^-4 mol NaOH reacts completely?

0.00496 g H2O Signup and view all the answers

Choose the correct setup for calculating the mass of HCl required to form a given mass of NaCl.

g NaCl x (mol NaCl / g NaCl) x (1 mol HCl / 1 mol NaCl) x (g HCl / mol HCl) Signup and view all the answers

How many moles of CaO form when 98.60 g CaCO3 decompose?

0.9851 mol CaO Signup and view all the answers

To determine the mass of CO2 that forms from a given mass of CaCO3, which of the following must be known? (Select all that apply)

Molar mass of CO2 Signup and view all the answers

If a propane heater burns 38.95 g C3H8, it consumes?

0.8830 mol C3H8 Signup and view all the answers

How many moles of oxygen are required to produce 37.15 g CO2?

1.407 mol O2 Signup and view all the answers

What mass of propane is necessary to react with the amount of oxygen calculated in the previous question?

12.41 g C3H8 Signup and view all the answers

Study Notes

Molar Mass and Conversion Factors

Molar mass of iron oxide (Fe2O3) is 159.7 g/mol, expressed as 159.7 g Fe2O3 / 1 mol Fe2O3.
Molar mass of aluminum oxide (Al2O3) is 102.0 g/mol, represented as 1 mol Al2O3 / 102.0 g Al2O3.

Mass and Moles Relationships

Mass of 2 moles of iron oxide is 319.4 g.
As mass increases, the number of moles in a sample increases.

Calculating Mass from Moles

Mass of 1.84 mol of NaCl is calculated to be 108 g (using molar mass of 58.44 g/mol).
Calculation method: 1.84 x (58.44 g NaCl / 1 mol NaCl) = 108 g.

Chemical Reactions and Mass Calculations

For reaction 2H2 + O2 → 2H2O with 1.45 × 10^-3 g O2, the mass of water produced is 1.63 × 10^-3 g.
In the equation 6CO2 + 6H2O → C6H12O6 + 6O2, from 71.89 g CO2, 49.05 g of glucose (C6H12O6) can be produced.
The mass of oxygen (O2) obtainable from 71.89 g CO2 is 52.27 g.

Water and CO2 Relationships

To react completely with 157.35 g CO2, 64.43 g of H2O is required.
The mass of oxygen formed from 15.90 g of glucose (C6H12O6) is 16.94 g.

Reactions of Sodium Hydroxide and Hydrochloric Acid

In the reaction NaOH + HCl → NaCl + H2O, 2.75 × 10^-4 mol of NaOH produces approximately 0.00496 g of water.

Molar Ratios and Mass Calculations

Correct setup for mass calculation of HCl to form NaCl involves converting grams of NaCl to moles, using the molar ratio, and then to grams of HCl.
Decomposition of 98.60 g CaCO3 yields 0.9851 mol of CaO.

Factors in CO2 Formation

To find the mass of CO2 from CaCO3, know the molar masses of CaCO3, CO2, and the mole ratio of CaCO3 to CO2.

Propane Combustion Reaction

Reaction C3H8 + 5O2 → 3CO2 + 4H2O implies that burning 38.95 g C3H8 consumes approximately 0.8830 mol of C3H8.
37.15 g of CO2 requires 1.407 mol of oxygen for production.
To react with that amount of oxygen, 12.41 g of propane is necessary.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your understanding of stoichiometric calculations with this quiz. From determining molar masses to converting between grams and moles, challenge your knowledge of chemical quantities. Perfect for chemistry students looking to reinforce their learning.