Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

17 Questions

0 Views

Mole Fraction Calculation Practice

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the mole fraction of HCl in the solution?

0.803

0.134

0.197 (correct)

1.21

What is the molar mass of HCl?

72.06 g/mol

180.156 g/mol

44.2 g/mol

36.5 g/mol (correct)

What is the number of moles of H2O in the solution?

88.6 mol

6.13 mol

1.21 mol

4.92 mol (correct)

How do you calculate the molar mass of a compound?

Multiply the atomic masses by the respective subscripts and then sum Signup and view all the answers

What is the chemical formula used to calculate the molar mass of glucose?

C6H12O6 Signup and view all the answers

What is the atomic mass of oxygen?

16.00 g/mol Signup and view all the answers

What is the advantage of expressing concentration in terms of mass?

It is less affected by temperature Signup and view all the answers

What is the formula to compute percent by mass of a solution?

Percent by mass = (mass of solute / mass of solution) × 100% Signup and view all the answers

In a 30% sugar solution, what is the mass of sugar in 100 grams of solution?

30 grams Signup and view all the answers

What is the purpose of computing the percent by mass of a sodium chloride solution in an aquarium?

To maintain the same concentration as sea water Signup and view all the answers

What is the fundamental difference between percent by mass and percent by volume?

The property of the solvent focused on Signup and view all the answers

When is it more advantageous to express concentration in terms of volume?

When the solute and solvent are liquids or gases Signup and view all the answers

What is the formula to calculate the percent by volume of a solution?

$\frac{\text{volume\ of\ solute}}{volume\ of\ solute + \ volume\ of\ solvent}$ ×100% Signup and view all the answers

What is the volume of water in a 100.0 ml 70.0% (v/v) ethyl alcohol-water solution?

30.0 ml Signup and view all the answers

What is the unit of molarity?

mol/L Signup and view all the answers

What is the formula to calculate the molarity of a solution?

M = $\frac{\text{moles\ of\ solute}}{\text{liter\ of\ solution}}$ Signup and view all the answers

What is the mass of glucose in a 150.0-ml solution that is used to prevent dehydration?

6.60 g Signup and view all the answers