Which reaction is endothermic?
h2(g) + ½ o2(g) → h2o(g), δh = -57.82 kcal
½n2(g) + o2(g) + 8.1 kcal → no2(g)
½n2(g) + 3/2h2(g) → nh3(g) + 11.0 kcal
c(diamond) + o2(g) → co2, δh = -94.50 kcal

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.

it would be d. henry moseley

hope this !

and sorry if i'm late. have a good rest of your day! : d