Use the density to convert volume into mass.
since the density is in g/ml and the volume was given in Liters, we need to first convert the Liters into mililiters. just multiply by 1000 or move the decimal three times.
0.1200 Liters= 120.0 mL
120.0 mL (0.8787 grams/ 1 mL)= 105 grams
If there is a constant loss of 
the concentration of 
will be affected and decrease since 
is a main component of 
.
Hope it helped,
BioTeacher101
2mm=2,000,000 nm
2,000,000/25=80,000
The answer is 80,000 polio viruses
Non metals gain electrons from the metals to have an octet structure.
