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Chapter 1: Q88E (page 9)
Question: Osmium is one of the densest elements known. What is its density if 2.72g has a volume of 0.121 cm3?
22.5 g/ cm3 is the density.
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Milk is sold by the liter in many countries. What is the volume of exactly 1/2 gal of milk in liters?
Convert 80.92 掳C to K and 掳F.
Many medical laboratory tests are run using 5.0 渭L blood serum. What is this volume in milliliters?
Yeast converts glucose to ethanol and carbon dioxide during anaerobic fermentation as depicted in the simple chemical equation here:
\({\rm{Glucose}} \to {\rm{Ethanol + Carbon Dioxide}}\)
(a) If\(200.0g\)of glucose is fully converted, what will be the total mass of ethanol and carbon dioxide produced?
(b) If the fermentation is carried out in an open container, would you expect the mass of the container and contents after fermentation to be less than, greater than, or the same as the mass of the container and contents before fermentation? Explain.
(c) If\(99.7g\)of carbon dioxide is produced, what mass of ethanol is produced?
Both graphite and diamond burn.
\({\bf{C}}\left( {{\bf{s, diamond}}} \right){\bf{ + }}{{\bf{O}}_{\bf{2}}}\left( {\bf{g}} \right) \to {\bf{C}}{{\bf{O}}_{\bf{2}}}\left( {\bf{g}} \right)\)
For the conversion of graphite to diamond:
\({\bf{C}}\left( {{\bf{s, graphite}}} \right) \to {\bf{C}}\left( {{\bf{s, diamond}}} \right){\bf{ \Delta {\rm H}}}_{{\bf{298}}}^{\bf{^\circ }}{\bf{ = 1}}{\bf{.90 kJ}}\)
Which produces more heat, the combustion of graphite or the combustion of a diamond?
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