Assertion: colorimeter's absorbance | /r/CapableOf | obtain two samples of city tap water
Facets:
value: from two different cities
type: LOCATION
Source sentences:
text: This absorbance will be subtracted from the readings you get using the iron samples, as follows: Using a 50 mL graduated cylinder, obtain two samples of city tap water, 50 mL each, from two different cities.