problem solving
Please write out step by step how you solve the problems .
40. Write Lewis structures for the following:
(a) O2
(b) H2CO
(c) AsF3
(d) ClNO
(e) SiCl4
(f) H3O +
(g) NH4 +
(h) BF4 –
(i) HCCH
(j) ClCN
(k) C2 2+
51. How much heat is required to convert 422 g of liquid H2O at 23.5 °C into steam at 150 °C?