How many joules must be added to a 1000 g iron skillet to increase its temperature from 25°C to 250°C? The specific heat of iron is 0.449 J/gºC.
A) 449 J
B) 101,025 J
C) 50,000 J
D) 112,250 J

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

1. explain hydrogen peroxide, h 2 o 2 properties and decomposition reaction. 2. describe how each of the following natural cycles plays a part in earth’s climate system. (a) the water cycle (b) the carbon cycle

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these