Potassium cyanide was once used to extract gold (Au) from ores via the following reaction.: 4 ?? + 8 ??? + ?2 + 2 ?2? → 4???(??)2 + 4 ??? How many grams of KCN are needed to extract (react with) 29.0 g (about an ounce) of gold

Potassium cyanide was once used to extract gold (Au) from ores via the following reaction.: 4 ?? + 8 ??? + ?2 + 2 ?2? → 4???(??)2 + 4 ??? How many grams of KCN are needed to extract (react with) 29.0 g (about an ounce) of gold

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter4: Stoichiometry

Section: Chapter Questions

Problem 4.43PAE: 4.43 Magnesium nitride forms in a side reaction when magnesium metal burns in air. This reaction may...

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Concept explainers

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

Potassium cyanide was once used to extract gold (Au) from ores via the following reaction.:

4 ?? + 8 ??? + ?2 + 2 ?2? → 4???(??)2 + 4

??? How many grams of KCN are needed to extract (react with) 29.0 g (about an ounce) of gold

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