How many equivalent resonance structures can be drawn for the molecule of SO3 without having to violate the octet rule on the sulfur atom?

A 0.355 M K2SO4 solution can be prepared by ________.

Based on molecular orbital theory, the bond order of the H—H bond in the H2+ ion is ________.

Of the following, the central atom is sp3d2 hybridized only in ________.

The Lewis structure of PF3 shows that the central phosphorus atom has ________ nonbonding and ________ bonding electron pair(s).

Lead (II) carbonate decomposes to give lead (II) oxide and carbon dioxide: PbCO3 (s) → PbO (s) + CO2 (g) How many grams of lead (II) oxide will be produced by the decomposition of 2.50 g of lead (II) carbonate?

An atom of 13C contains ________ protons.

Based on molecular orbital theory, the bond order of the N—N bond in the N2 molecule is ________.

The hybridizations of iodine in IF3 and IF5 are ________ and ________, respectively.

Which atom has the smallest number of neutrons?