Why is cracking a necessary part of the refinement of crude oil? A. It is not needed only recommended

B. because the demand for lead found in gasoline

C. because the demand for the mid-range hydrocarbons (C7-C12) found in gasoline exceeds the amount produced by the distillation
of crude oil

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.