Stoichiometry 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) 350 345 140 485 350 345 140 485 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Enthalpy of formation of NH₃ is - 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH₃ → N₂ + 3H₂, is equal to __________ kJ/kg. mole. 92 -92 46 -23 92 -92 46 -23 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry Size range of the colloidals particles is 500 - 1000 microns 10 - 50 Angstrom 50 - 200 microns 5 - 200 milli-microns 500 - 1000 microns 10 - 50 Angstrom 50 - 200 microns 5 - 200 milli-microns ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry 1 kg/m² is equal to __________ mm water column. 1000 10 100 1 1000 10 100 1 ANSWER DOWNLOAD EXAMIANS APP
Stoichiometry The value of Trouton's ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kis-tyakowsky equation is used for calculation of Trouton's ratio of __________ liquids. Non-polar Neither A nor B Polar Both A & B Non-polar Neither A nor B Polar Both A & B ANSWER DOWNLOAD EXAMIANS APP
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