Answer:
C) a log in the campfire turns into ashes
I just finished my assignment and this is what I got. Try to put these in your own words. (: Hope this helps.
D= M/V so, D=300/40 wich is 7.5 so D= 7.5g/m3
is 7 cus the valance electron for sodium is Ne 3s1 and for chlorine is Ne 3s13p5