The weight of 10 identical samples of a substance is 0.001 pound what is the weight of 100 samples?

0.01 pound, assuming the 100 samples are also all identical.

So 10things=0.001lb

find 100things

10tings=0.001

10things to 0.001 = 100things to y

10t/0.001=100t/y

mulltiply both sides by y

10ty/0.001=100t

multiply both sides by 0.001

10ty=0.1t

divide both sides by 10t

y=0.01lb

the weight of 100 samples is 0.01 lb