Given the following reactionsFe2O3 (s) + 3CO (s) → 2Fe (s) + 3CO2 (g)ΔH = -28.0 kJ 3Fe (s) + 4CO2(s) → 4CO (g) + Fe3O4(s)ΔH = +12.5 kJthe enthalpy of the reaction of Fe2O3 with CO 3Fe2O3 (s) + CO (g) → CO2 (g) + 2Fe3O4 (s)is ________ kJ.

How many grams of potassium bromide are there in 250.0 mL of a 2.50 M aqueous solution of potassium bromide?

PCl5 has ________ electron domains and a ________ molecular arrangement.

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.