The smallest living organism discovered so far is called a mycoplasm. Its mass is estimated as 1.0 × 10^–16 g. Express this mass in
a. petagrams
b. femtograms
c. attograms
peta = 1015
femto = 10-15
atto = 10-18
so 10-16 grams = 10-31 petagrams = 0.1 femtograms = 100 attograms
.