Question

1. convert 2.5 x 10^{-3} g of vitamin a in zeptograms.

Explanation:

Step1: Recall the conversion factor

1 g = 10^{21} zeptograms (zg)

Step2: Set up the conversion

We have 2.5×10^{-3} g. Multiply by the conversion factor: 2.5×10^{-3}×10^{21} zg

Step3: Use exponent rule

a^m×a^n=a^{m + n}, so 2.5×10^{-3}×10^{21}=2.5×10^{-3 + 21}=2.5×10^{18} zg

Answer:

2.5×10^{18} zg