Salt - Na Cl
Sodium(metal) and chloride(nonmetal)
<u>Answer:</u> The volume of iron is 
<u>Explanation:</u>
To calculate volume of a substance, we use the equation:

We are given:
Mass of iron = 52.6 lbm = 23.86 kg (Conversion factor: 1 kg = 2.205 lbm)
Density of iron = 
Putting values in above equation, we get:

Hence, the volume of iron is 
Answer:
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Educated Guess Here!
Since Br-80 does not exist, maybe that means Br-79 or Br-81 have very unequal abundances. For example, Br-79 may have 75% abundance whereas Br-81 may have 25% abundance.