Calculate, how much energy must be added to 100 g of water in a pan for it is to be warmed from 20 oC to 30 oC. Assume heat capacity of water is 4.18 J/(K·g)

Express the following number in scientific notation. 0.026890 =

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?