A sample of Aluminum requires 4.0 J of energy to change its temp from 25 C to 32 C. What is the mass of the aluminum? Specific heat of Al=0.89.

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

Stage in which a typical star has completely stopped fusion

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.