Question 4 and 6 equivalent4. A sample of 2.12 g of copper was heated in an oxygen atmosphere until no further change tookplace. The resulting oxide weighed 2.65 g. Calculate the empirical formula of the oxide.5. Calculate the percent magnesium in the oxide assuming the formula MgO to the maximum numberof significant figures possible using the molar mass data in your lecture text.6. If the percent magnesium in the oxide is determined experimentally to be 60.38%, what is the %error in this experiment?

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Answered: 4. A sample of 2.12 g of copper was…

4. A sample of 2.12 g of copper was heated in an oxygen atmosphere until no further change took place. The resulting oxide weighed 2.65 g. Calculate the empirical formula of the oxide.

Introductory Chemistry: A Foundation

8th Edition

ISBN:9781285199030

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter8: Chemical Composition

Section: Chapter Questions

Problem 120AP

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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.

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Question 4 and 6

equivalent
4. A sample of 2.12 g of copper was heated in an oxygen atmosphere until no further change took
place. The resulting oxide weighed 2.65 g. Calculate the empirical formula of the oxide.
5. Calculate the percent magnesium in the oxide assuming the formula MgO to the maximum number
of significant figures possible using the molar mass data in your lecture text.
6. If the percent magnesium in the oxide is determined experimentally to be 60.38%, what is the %
error in this experiment?

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