What is the main source of benzene? a) Benzene is obtained from ...

[P68T]

What is the main source of benzene?
  a) Benzene is obtained from coal tar, a by-product of soft coal.
  b) All benzene is synthetic, that is, man-made.
  c) Benzene is obtained from petroleum.
  d) Benzene forms as a product of incomplete electrolysis.

Question 2

Three particles are placed in the xy plane. A 30-g particle is located at (3, 4) m, and a 40-g particle is located at (2, 2) m. Where must a 20-g particle be placed so that the center of mass of the three-particle system is at the origin?
 a. (3, 1) m
  b. (+1, +3) m
  c. (+3, 1) m
  d. (1, 3) m
  e. (0.5, 2) m

[sarah_brady415]

Answer to Question 1

c

Answer to Question 2

e

[P68T]

Excellent

[ttt030911]

Gracias!