Heat of fusion (ΔHfusΔHfusDeltaH_fus) is used for calculations involving a phase change between solid and liquid, with no temperature change. For H2OH2O, ΔHfus=6.02 kJ/molΔHfus=6.02 kJ/mol. Specific heat capacity (CCC) is used for calculations that involve a temperature change, but no phase change. For liquid water, C=4.184 J/(g⋅∘C)C=4.184 J/(g⋅∘C). Heat of vaporization (ΔHvapΔHvapDeltaH_vap) is used for calculations involving a phase change between liquid and gas, with no temperature change. For H2OH2O, ΔHvap=40.7 kJ/molΔHvap=40.7 kJ/mol. Part A How much heat is required to melt 78.0 gg of ice at its melting point? Express your answer numerically in kilojoules.

Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in cl−. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42−. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback