Problem: An ionic compound forms when lithium (Z = 3) reacts with oxygen (Z = 8). If a sample of the compound contains 8.4×1021 lithium ions, how many oxide ions does it contain?

🤓 Based on our data, we think this question is relevant for Professor Costanza's class at USF.

FREE Expert Solution

The reaction between a metal and oxygen produces a metal oxide.


Lithium forms lithium oxide when it reacts with oxygen. The reaction is:


<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>4</mn><msub><mi>Li</mi><mfenced><mi mathvariant="normal">s</mi></mfenced></msub><mo>&#xA0;</mo><mo>+</mo><mo>&#xA0;</mo><msub><mi mathvariant="normal">O</mi><mrow><mn>2</mn><mfenced><mi mathvariant="normal">g</mi></mfenced></mrow></msub><mo>&#xA0;</mo><mo>&#x2192;</mo><mo>&#xA0;</mo><mn>2</mn><msub><mi>Li</mi><mn>2</mn></msub><msub><mi mathvariant="normal">O</mi><mfenced><mi mathvariant="normal">s</mi></mfenced></msub></math>


We have the following data:


Li+ ions in compound = 8.4x1021

O2- ions in compound = ?


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Problem Details

An ionic compound forms when lithium (Z = 3) reacts with oxygen (Z = 8). If a sample of the compound contains 8.4×1021 lithium ions, how many oxide ions does it contain?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Stoichiometry concept. You can view video lessons to learn Stoichiometry. Or if you need more Stoichiometry practice, you can also practice Stoichiometry practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Costanza's class at USF.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.