Some one helppp meee ASAAAP

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

For the reaction shown, find the limiting reactant for each of the following initial amounts of reactants. 4al(s)+3o2(g)→2al2o3(s) a) 1 molal, 1 mol o2 b) 4 molal, 2.6 mol o2 c) 16 molal, 13 mol o2 d) 7.4 molal, 6.5 mol o2