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Chemistry / General, Organic, and Biological Chemistry: Structures of Life 4 / Chapter 6 / Problem 43QP

General, Organic, and Biological Chemistry: Structures of Life | 4th Edition | ISBN: 9780321750891 | Authors: Karen C. Timberlake

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Caffeine, C8H10N4O2, is obtained from tea, coffee, and

Chapter 6, Problem 43QP

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QUESTION:

Caffeine, C8H10N4O2, is obtained from tea, coffee, and energy drinks. Coffee beans are a source of caffeine.a. How many grams of caffeine are in 0.850 mole?b. How many moles of caffeine are in 28.0 g of caffeine?c. How many moles of carbon are in 28.0 g of caffeine?d. How many grams of nitrogen are in 28.0 g of caffeine?

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QUESTION:

Caffeine, C8H10N4O2, is obtained from tea, coffee, and energy drinks. Coffee beans are a source of caffeine.a. How many grams of caffeine are in 0.850 mole?b. How many moles of caffeine are in 28.0 g of caffeine?c. How many moles of carbon are in 28.0 g of caffeine?d. How many grams of nitrogen are in 28.0 g of caffeine?

ANSWER:

Solution 43QPStep 1 of 4:a. Here, we are asked to find the mass (in grams) of Caffeine, C8H10N4O2 in 0.850 mole.Number of moles = 0.850 moleMolar mass of caffeine = 194.19 g/mol1 g of caffeine = 194.19 g Number of moles = This can be rewritten as: Mass of the compound = Number of moles molar mass of the compound = 0.850 mol194.19g/mol = 165.06 grams. Hence, the mass of the caffeine in 0.850 mole is 165.06 grams. ________________

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