Which statement identifies the particles of gases affect one another's motion? a) they affect one another's motion only when they collide. b) they affect one another's motion only if there are forces of attraction between them. c) they do not affect one another's motion. i need with this question

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

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements