How many atoms of oxygen are in 1.00 mol of sulfur dioxide, SO2?
a. 64.1
b. 64.1 × 6.02 × 10^23
c. 12.0 × 10^23
d. 6.02 × 10^23
c
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Compound Microscope: The distance between the object to be viewed and the eyepiece of a compound microscope is 25.0 cm. The focal length of its objective lens is 0.200 cm and the eyepiece has a focal length of 2.60 cm. What is the magnitude of the total magnification of the microscope when used by the person of normal eyesight if it is designed for minimum eyestrain?
A. 1070 B. 204 C. 520 D. 477 E. 772
A particular lightbulb produces 8 J of thermal energy while producing 2 J of radiant energy, and this is its entire energy output during this time. How energy-efficient is this bulb [as a producer of light]?
A) 400% B) 20% C) 25% D) 500% E) 80%
The difference between Newton's law as a proportion and an equation involves
A) the constant G. B) the equal sign. C) one being a vector and the other not. D) magnitude and direction.
Heat flows into a gas in a piston and the gas performs some work on its surroundings. The amount of work done is less than the heat added. In this situation,
A. the internal energy of the gas did not change. B. the gas experienced a phase change. C. the internal energy of the gas decreased. D. the internal energy of the gas increased. E. energy is not conserved and so it cannot happen.