C) we can see Sirius as it looked 8.8 light years ago.
CaF2 = Calcium fluoride (leave it as is, it in emoerical form already)
Na20 = Sodium oxide (leave it as is, it in emoerical form already)
BaS = Barium Sulfide (leave it as is, it in emoerical form already)
CuSO4 = Copper(II) sulfate = CuSO4 5H2O
Fe2O3 = Iron(III) oxide (leave it as is, it in emoerical form already)
HgCl2 = Mercury(II) chloride (leave it as is, it in emoerical form already)
KC2H3O2 = Potassium Acetate (leave it as is, it in emoerical form already)
Al(OH)3 = Aluminium hydroxide (leave it as is, it in emoerical form already)
Fe(NO3)3 = Iron(III) nitrate (leave it as is, it in emoerical form already)
N2O5 = Dinitrogen pentoxide = N2O5 (it's subscrip is already simplified)
PO5 = Phosphorus pentoxide = P2 O5 (there was just no 2 after the P so that's all that was needed there)
I'm am so sorry if this didn't help too much, I hope I did help, I in some way, have a wonderful day.
To answer the question above, we make use of the equation,
heat = (specific heat ) x mass x (change in temperature)
Substituting the known values,
heat = (0.128 J/g°C) x (3.3 kg)(1000g / 1kg) x (69°C - 26°C)
= 18163.2 J
Therefore, the amount of heat required is approximately 18163.2 J.
Because the molecules are more spread apart.
(gas spread)
