Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 7: Problem 23

How many moles of magnesium oxide are there in \(2.50 \times 10^{25}\) formula units of MgO?

Short Answer

Expert verified
There are 41.5 moles of MgO in \(2.50 \times 10^{25}\) formula units of MgO.

Step by step solution

01

Understanding Avogadro's number

Avogadro's number, \(6.02 \times 10^{23}\), is the number of entities (like atoms, molecules, ions etc.) in one mole of a substance. It functions as a conversational factor.
02

Set up the conversion

We know the number of formula units of MgO and want to convert this into moles. We can use Avogadro's number as our conversion factor. The set up is: \((2.50 \times 10^{25}\) formula units) \( \times \) (1 mole \/ \(6.02 \times 10^{23}\) formula units). So we are multiplying the given number of formula units by a fraction: the mole is in the numerator (because we want to end up in moles), and Avogadro's number is in the denominator (because we want to cancel out formula units).
03

Carry out the calculation

Now it's just a matter of multiplying and dividing. \(2.50 \times 10^{25}\) divided by \(6.02 \times 10^{23}\) equals 41.5 moles of MgO.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

The empirical formula of the anticancer drug altretamine is \(\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{N}_{2}\) . The experimental molar mass is 210 \(\mathrm{g} / \mathrm{mol} .\) What is its molecular formula?

What do you need to calculate the percentage composition of a substance?

a. How many formula units are there in a 3.12 mol sample of MgCl_ \(?\) b. How many Cl- ions are there in the sample?

For an element, what is the relationship between atomic mass and molar mass?

How many grams are in 2.7 \(\mathrm{mol}\) of table salt, NaCl (molar mass of \(\mathrm{NaCl}=\) 58.44 \(\mathrm{g} / \mathrm{mol} ) ?\)
See all solutions

Recommended explanations on Chemistry Textbooks

Chemical Analysis

Read Explanation

Nuclear Chemistry

Read Explanation

Making Measurements

Read Explanation

Kinetics

Read Explanation

Ionic and Molecular Compounds

Read Explanation

The Earths Atmosphere

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free