Answer:
Fe2O3
Explanation:
the answer is variable
#4 is C
#5 is D
#6 is A
bruh this is easy
12.044 x 10^23 atoms Na
1 mol Na has 6.022 x 10^23 atoms of Na
2 moles Na have 2 x NA = 2 x 6.022 x10^23 atoms Na
