Ti, V, Cr, Mn, Fe, Co, No, Cu a) State the colour of the ion
I) Co²+
ii) Cr³+

B) Pick an element which is used as a catalyst in
(i) Haber Process to manufacture ammonia.

(ii) Hydrogenation of unsaturated oil palm to margarine.​

What are the chemical names of these compounds? ke: mg3n2: reset next

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)

Insoluble sulfide compounds are generally black in color. which of the following combinations could yield a black precipitate? check all that apply. na2s(aq)+kcl(aq) li2s(aq)+pb(no3)2(aq) pb(clo3)2(aq)+nano3(aq) agno3(aq)+kcl(aq) k2s(aq)+sn(no3)4(aq)