The specific heat of solid water (ice) and liquid water are 2.03 J/gºC and 4.18 J/gºC respectively. Heating a 49.3 g sample of
ice from -25.0°C to water at 44.7 °C requires 28.23 kJ of heat.
Calculate the heat of fusion of water in J/g. Assume the
melting point of water is 0 °C.

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.