Which of the following could be the molecular formula for an alkane?
a. C3H3
b. C7H14
c. C4H7
d. C10H18
e. C6H14
e
Physics & Space Science
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Roughly how many different chemical compounds are there?
A) 20 B) 100 C) 4 D) 500 E) many more than 500
Physics & Space Science
A gasoline engine absorbs 2 500 J of heat at 250°C and expels 2 000 J at a temperature of 50°C. The magnitude of the change in entropy (in J/K) for the system is
a. 6.2 b. 4.7 c. 1.4 d. 10.9 e. 3.2
Physics & Space Science
Which of the following can be described as the totality of all space, time, matter, and energy?
A) The universe B) Astronomy C) The Milky Way D) The Earth E) The solar system
Physics & Space Science
A certain ideal gas has a molar specific heat at constant pressure of 7R/2. What is its molar specific heat at constant volume?
A) 5R/2 B) 3R/2 C) 8R D) 9R/2 E) 6R
Physics & Space Science