You just need to convert it into moles per Liter (mol/L).
0.0815mol / 0.550L = 0.148mol/L
5.167g of calcium chloride is dissolved in 101.0mL of water in a calorimeter whose calorimeter constant is 15.3J/°C. The temperature rises from 18.4°C to 27.2 ...
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I do not understand your question, what is the question, name what??