Joey uses 450 J of energy to raise the temperature of a block of aluminum from 20 degrees C to 40 degrees C. Calculate the mass of the aluminum present in the sample. Specific heat of aluminum is 0.904 J/gC
a. 13.5g
b. 12.5g
c. 22.0g
d. 35.4g
(please show me how to do it, not just the answer, please)

Which statement describes how phase changes can be diagrammed as a substance is heated? the phase is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the phase is on the x-axis. the time is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the time is on the x-axis.

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

In the particles are arranged in a regular, repeating pattern. a)a crystalline liquid b)a crystalline solid c)all gases d)all solids