Id really appreciate it i have no clue what the order is

atomic number-79

atomic mass-197

number of orbits-6

number of neutrons-118

number of valence electrons-1

number of electrons n=3-18

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

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.