Which of the following generic chemical reactions can be expected to be endothermic? A2(l) + BC(g) -> A2BC(g)

AB(g) + CB(g) -> AC(g) + B2(g)

A2CB(l) -> A2B(l) + CB2(g)

2AB(g) -> A2B2(g)

helloi think dog cat bunny dog cat bunny dog cat bunny

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.