Chapter 1: Q96E (page 9)
Convert the temperature of dry ice, \( - 77{\rm{ }}^\circ C,\) into degrees Fahrenheit and kelvin.
The temperature of dry ice \( - 77^\circ C,\) in degrees Fahrenheit and Kelvin are -107 and 196 K, respectively.
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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?
The following are properties of isotopes of two elements that are essential in our diet. Determine the number of protons, neutrons and electrons in each and name them.(a) atomic number 26, mass number 58, charge of 2+(b) atomic number 53, mass number 127, charge of 1−
Round off each of the following numbers to two significant figures:
(a) 517
(b) 86.3
(c) 6.382 ×103
(d) 5.0008
(e) 22.497
(f) 0.885
Which molecule has a molecular mass of 28.05 amu?
(a) \({\rm{HC}} \equiv {\rm{CH}}\)
(b)
(c)
Calculate these volumes.
a) What is the volume of 25g of iodine, density = 4.93 g/cm3?
b) What is the volume of 3.28 g gaseous hydrogen, density = 0.089 g/L?
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