Without using the value of So, predict the sign for a) 2K(s) + F2(g) → 2KF(g)
b) NaClO3(s) → Na+(aq) + ClO3-(aq)
c) 2NO(g) + O2(g) → 2NO2(g)
d) H2S(g) + O2(g) → S8(s) + H2O(g)

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

Which of the following are sources of revenue for media companies? a. direct sales to producers b.advertising and subscriptions c. online purchase d. capital investments

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous