9. The identity of an element can be determined on the basis of which one of the following? A) The number of protons in an atom of the element.
B) The number of neutrons in an atom of the element.
C) The mass number of the element.
D) The atomic mass of the element.

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

Particles vibrate in a rigid structure and do not move relative to their neighbors.

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90