A jeweler heated a sample of gold from 24.0°C to 45.0°C. The specific heat of gold is 0.129 J/g•°C. If the gold absorbed 13.0 J of heat, what is the mass of the gold?

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?

How do you know when a chemical reaction has occurred