If the empirical formula of a compound is known, what is needed in order to determine the molecular formula? a the molar mass
b the density
c the molecular geometry
d the coordination numbers

Which of the following is not a benefit of green revolution? a) new crop varieties b) increased crop yields c) cost effective d) new crops may require larger amonts of water than the previous ones.

How do you date a sample of rock that you suspect as being one of the earliest on earth

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.