Question

What is the mass of a single human red blood cell (approximately 27 pg) expressed in kilograms?
a) 2.7 x 10⁻¹⁴ kg
b) 2.7 x 10⁻¹⁷ kg
c) 2.7 x 10⁻²⁰ kg
d) 2.7 x 10⁻²³ kg