Answer:
From part D, the mass of an average grain of rock salt is 120 x 10^-4. The first factor is 120.
The mass of an average grain of table salt is 3 x 10^-4. The first factor is 3. Let x times the first factor of the mass of an average grain of table salt be equal to the first factor of the mass of an average grain of rock salt.
3x = 120
x = 120/3
x = 40
So, the first factor of the mass of an average grain of rock salt (120) is 40 times the first factor of the mass of an average grain of table salt (3).
Explanation:
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