Where would you expect to isolate molecules in a fractionating tower that have a large number of interatomic forces?
A) near the bottom
B) near the top
C) near the middle
D) Fractional distillation takes advantage of molecular weight.
E) Fractional distillation takes advantage of the number of isomers.
Answer: A
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The surface temperature of the star is 6000 K. At what wavelength is its light output a maximum? The constant in Wien's law is 0.00290 m ? K
A) 850 nm B) 907 nm C) 311 nm D) 483 nm E) 502 nm
The force due to gravity between two objects depends on I. the mass of each object. II. the distance each object is from Earth. III. the distance between the two objects. IV. the speed of light
a. I & II b. I & III c. II & IV d. I, II, & III e. I, II, III, & IV
A 4.00 kg object is moving at 5.00 m/s NORTHWEST. It strikes a 6.00 kg that is moving SOUTHWEST at 2.00 m/s. The objects have a completely inelastic (stick together) collision. The kinetic energy lost in the collision is
A. 20.4 J. B. 28.7 J. C. 34.8 J. D. 40.2 J. E. 45.1 J.
Significant Figures: If a circle has a radius of 1.109 m, what is its area expressed to the correct number of significant figures?
A. 3.86 m2 B. 3.863 m2 C. 3.864 m2 D. 3.8638 m2 E. 3.86379 m2