The specific heat of solid water (ice) and liquid water are 2.03J/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.

Identify a specific example for each type of technology

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.