Calculate the enthalpy change, Delta H, for the process in which 44.0 g of water is converted from liquid at 0.5 °C to vapor at 25.0 °C. For water, Delta Hvap = 44.0 kJ/mol at 25.0 °C and C; = 4.18 J/(g."
• °C) for H2O(1)

Express your answer to three significant figures and include the appropriate units.

How many grams of ice at -15.5 degrees C can be completely converted to liquid at 16.4 degrees C if the available heat for this process is 5.26 x 10 ^ 3 kJ?

For ice, use specific heat of 2.01 j/(g x degrees C) and delta Hfus = 6.01kJ/mol

Calculate the number of molecules present in 0.750 mol of mgo.

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.

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