Final answer:
The mass of 100 microbes, given that one microbe has a mass of 2.63 x 10⁻²⁰ grams, is 2.63 x 10⁻ⁱ⁸ grams.
Step-by-step explanation:
If one microbe has a mass of 2.63 x 10⁻²⁰ grams, then the mass of 100 microbes can be calculated by multiplying the mass of one microbe by 100. This gives us:
Mass of 100 microbes = 2.63 x 10⁻²⁰ grams x 100 = 2.63 x 10⁻²⁰ x 10² grams = 2.63 x 10⁻ⁱ⁸ grams
The correct answer is A) 2.63 x 10⁻ⁱ⁸ grams.