Predict the energy trend as a substance changes from a solid to liquid to gas on this graph. a) it would increase from bottom left to top right. b) it would decrease from top left to bottom right. c) it would be a horizontal line as energy would remain constant. d) it would increase from solid to liquid, then decrease from liquid to gas.

A) It would increase from bottom left to top right.

Explanation:

The energy that can be found in matter, is the energy of the particles moving inside it, so as you know in a solid state the particles move slower and are almost set still in a single spot, so the energy will increase as the substance goes from solid, to liquid to gas, because the energy in the particles will increase.

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles