Chemical Engineering - Stoichiometry

Molar heat capacity of water in equilibrium with ice at constant pressure is

If pH value of a solution is 8, then its pOH value will be

The chemical nature of an element is independent of

The heat change for the reaction, C(s) + 2S(s) → CS₂(l), is 104.2 kJ. It represents the heat of

A sample of well water contains 140 gm/m³ Ca²⁺ ions and 345 gm/m³ Na⁺ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO₃ in gm/m³ is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)