During which processes does the space between particles tend to increase?

Heating

Explanation:

Matter comprises of particles called atoms or molecules. Particles are held together by a strong force of attraction between them. The force of attraction is strongest in solids and weakest in liquids.

When matter is heated, the particles absorb the energy and start colliding with each other. The particles strike each other with force, causing the force of attraction between them to reduce.  

As the force of attraction reduces, the particles move further apart from each other causing the space between them to increase.  

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