A 4.1 kg iron shovel is left outside through the winter to react with the oxygen gas in the atmosphere. The shovel now orange with rust, iron oxide, has a mass of 4.5 kg. How much oxygen combined with the iron?

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

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

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom